91
Practice Get your Skill Books ready…
Practice
Get your Skill Books ready…
You have 5 minutes to do as many
questions as possible.
Please time yourself.
Your time is up!
Get ready to mark your answers
Practice
Mental Strategies Answers
Q Question Answer
1 1 + 4 5
2 19 + 81 100
3 Halve 2 1
4 42 − 10 32
5 124 + ☐ = 200 76
6 84 = 34 + ☐ 50
7 925 − 920 5
8 7 × 8 = 56, so 56 ÷ 7 = ☐ 8
9 Write 1:58 pm in 24 hour clock format 13:58
10 6:59 am is how many minutes after 6:19 am? 40
Practice
Timestables Answers
Q Question Answer
1 2 × 6 = ☐ 12
2 8 ÷ 2 = ☐ 4
3 1 × ☐ = 10 10
4 10 ÷ ☐ = 1 10
5 9 × 7 = ☐ 63
6 5 ÷ 5 = ☐ 1
7 ☐ × 8 = 72 9
8 ☐ ÷ 8 = 3 24
9 2 × 4 = ☐ 8
10 18 ÷ 6 = ☐ 3
Practice
Key Skills Answers
Q Question Answer
1 3 × 991 2973
2 16182 − 8764 7418
3 2.3 × 7.17 16.491
4 0.45 as a fraction 45/100 or 19/20
5 22.17 + 8.31 30.48
6 (−48) ÷ 6 −8
7If a = 6 b = 3 and c = 10, what is the value of
bc / a ?5
8 (−10) − (−5) −5
9What is the highest common factor of 15 and
27?3
10 What is the value of 7 squared? 49
Practice
Calculate your
Ninja Score to see
which Ninja Belt
you’ve earned
today!
Week 1 Session 1
Get your Skill Books ready…
You have 5 minutes to do as many
questions as possible.
Please time yourself.
Your time is up!
Get ready to mark your answers
Week 1 Session 1
Mental Strategies Answers
Q Question Answer
1 ☐ + 5 = 10 5
2 Double 3 6
3 Halve 35 17.5
4 173 + 50 223
5 47 + 44 91
6 32 + 10 = 32 + 8 + ☐ 2
7 1 + 566 567
8 40 + 68 = 40 + 60 + ☐ 8
9 3 + 2 5
10 4 + ☐ = 20 16
Week 1 Session 1
Timestables Answers
Q Question Answer
1 6 × 3 = ☐ 18
2 14 ÷ 2 = ☐ 7
3 6 × ☐ = 36 6
4 18 ÷ ☐ = 6 3
5 9 × 3 = ☐ 27
6 32 ÷ 8 = ☐ 4
7 ☐ × 4 = 24 6
8 ☐ ÷ 10 = 4 40
9 4 × 2 = ☐ 8
10 30 ÷ 3 = ☐ 10
Week 1 Session 1
Key Skills Answers
Q Question Answer
1 2688 ÷ 3 896
2 8 + 8 ÷ 2 12
3 245.52 ÷ 4 61.38
4 6.14 × 10 61.4
5 16.15 − 5.11 11.04
6 Write 63/70 in its simplest form 9/10
7 Which is the lowest number, 3 or −9? −9
8 See number line 45
9 List the first 4 multiples of 14 14, 28, 42, 56
10 What is the value of (−4) cubed? −64
0
1
2
3
4
5
25 75
Value of the dot?
Week 1
Session 1
Calculate your
Ninja Score to see
which Ninja Belt
you’ve earned
today!
Week 1 Session 2
Get your Skill Books ready…
You have 5 minutes to do as many
questions as possible.
Please time yourself.
Your time is up!
Get ready to mark your answers
Week 1 Session 2
Mental Strategies Answers
Q Question Answer
1 3 + 17 20
2 What is double 55? 110
3 112 + 10 122
4 29 − 10 19
5 6 = 1 + ☐ 5
6 58 − 11 = 58 − 8 − ☐ 3
7 73 + 73 = ☐ × 73 2
8Draw hands on the clock face showing 10:10
amSee clock above
9 7 + 3 10
10 ☐ + 46 = 100 54
Week 1 Session 2
Timestables Answers
Q Question Answer
1 6 × 7 = ☐ 42
2 24 ÷ 4 = ☐ 6
3 4 × ☐ = 28 7
4 24 ÷ ☐ = 4 6
5 7 × 6 = ☐ 42
6 18 ÷ 6 = ☐ 3
7 ☐ × 4 = 4 1
8 ☐ ÷ 2 = 3 6
9 5 × 7 = ☐ 35
10 54 ÷ 6 = ☐ 9
Week 1 Session 2
Key Skills Answers
Q Question Answer
1 481 + 1429 1910
2 (9 − 5)2 + 3 × 4 28
3 Write One Thousand and Thirty Two in digits 1032
4 0.35 ÷ 100 0.0035
5 (−6) × (−10) 60
6 Round 81.4358 to 2 d.p. 81.44
7 (−5) + (−5) −10
8 Round 21 to 2 s.f. 21
9 Letter at (0, −1) S
10 1/4 = 3/☐ 12
Week 1
Session 2
Calculate your
Ninja Score to see
which Ninja Belt
you’ve earned
today!
Week 2 Session 1
Get your Skill Books ready…
You have 5 minutes to do as many
questions as possible.
Please time yourself.
Your time is up!
Get ready to mark your answers
Week 2 Session 1
Mental Strategies Answers
Q Question Answer
1 ☐ + 3 = 5 2
2 68 + ☐ = 100 32
3 What is half of 4? 2
4 189 − 10 179
5 161 + ☐ = 240 79
6 74 = 24 + ☐ 50
7 629 − 627 2
8 9 × 5 = 45, so 45 ÷ 9 = ☐ 5
9 Write 8:23 am in 24 hour clock format 08:23
10 2:15 pm is how many minutes after 2:05 pm? 10
Week 2 Session 1
Timestables Answers
Q Question Answer
1 5 × 1 = ☐ 5
2 24 ÷ 8 = ☐ 3
3 5 × ☐ = 30 6
4 45 ÷ ☐ = 9 5
5 6 × 1 = ☐ 6
6 40 ÷ 4 = ☐ 10
7 ☐ × 1 = 10 10
8 ☐ ÷ 3 = 9 27
9 6 × 4 = ☐ 24
10 2 ÷ 2 = ☐ 1
Week 2 Session 1
Key Skills Answers
Q Question Answer
1 What is 4/6 of 30? 20
2 3 × 911 2733
3 16071 − 8966 7105
4 6.9 × 5.85 40.365
5 8/10 as a decimal number 0.8
6 23.8 + 0.55 24.35
7 (−18) ÷ 9 −2
8If a = 6 b = 8 and c = 4, what is the value of
(2b/c)2 16
9 (−1) − (−3) 2
10 Is 1 a factor of 3? Yes
Week 2
Session 1
Calculate your
Ninja Score to see
which Ninja Belt
you’ve earned
today!
Week 2 Session 2
Get your Skill Books ready…
You have 5 minutes to do as many
questions as possible.
Please time yourself.
Your time is up!
Get ready to mark your answers
Week 2 Session 2
Mental Strategies Answers
Q Question Answer
1 ☐ + 7 = 10 3
2 What is double 9? 18
3 Halve 40 20
4 111 + 30 141
5 66 + 63 129
6 17 + 9 = 17 + 3 + ☐ 6
7 3 + 468 471
8 33 + 70 = 30 + 70 + ☐ 3
9 Double 58 116
10 What is half of 7? 3.5
Week 2 Session 2
Timestables Answers
Q Question Answer
1 6 × 2 = ☐ 12
2 36 ÷ 6 = ☐ 6
3 5 × ☐ = 15 3
4 56 ÷ ☐ = 7 8
5 3 × 9 = ☐ 27
6 5 ÷ 5 = ☐ 1
7 ☐ × 9 = 9 1
8 ☐ ÷ 6 = 3 18
9 8 × 3 = ☐ 24
10 18 ÷ 3 = ☐ 6
Week 2 Session 2
Key Skills Answers
Q Question Answer
1 What is 125% of £150? £187.50
2 1710 ÷ 5 342
3 85 − 15 ÷ 5 82
4 28.82 ÷ 0.5 57.64
5 71.204 × 100 7120.4
6 25 − 1.33 23.67
7 Simplify 6/60 1/10
8 Which is the lowest number, −4 or −3? −4
9 See number line 0.6
10 List the first 4 multiples of 11 11, 22, 33, 44
0
1
2
3
4
5
0 2.1
Value of the dot?
Week 2
Session 2
Calculate your
Ninja Score to see
which Ninja Belt
you’ve earned
today!
Week 3 Session 1
Get your Skill Books ready…
You have 5 minutes to do as many
questions as possible.
Please time yourself.
Your time is up!
Get ready to mark your answers
Week 3 Session 1
Mental Strategies Answers
Q Question Answer
1 1 + ☐ = 20 19
2 Double 54 108
3 22 + 10 32
4 44 − 40 4
5 7 = 2 + ☐ 5
6 75 − 11 = 75 − 5 − ☐ 6
7 6 + 6 + 6 + 6 + 6 = 6 × ☐ 5
8 What is the time on the clock? 4:50 pm
9 Double 7 14
10 What is half of 44? 22
Week 3 Session 1
Timestables Answers
Q Question Answer
1 6 × 6 = ☐ 36
2 2 ÷ 2 = ☐ 1
3 6 × ☐ = 12 2
4 40 ÷ ☐ = 5 8
5 1 × 9 = ☐ 9
6 40 ÷ 8 = ☐ 5
7 ☐ × 7 = 49 7
8 ☐ ÷ 3 = 1 3
9 2 × 2 = ☐ 4
10 48 ÷ 6 = ☐ 8
Week 3 Session 1
Key Skills Answers
Q Question Answer
1 What is the value of 112? 121
2 7905 + 626 8531
3 (10 − 9) × 1 1
4Write 744620 in words. (Use the opposite page
for your answer)
Seven Hundred and
Forty Four Thousand,
Six Hundred and
Twenty
5 0.67 ÷ 100 0.0067
6 3 × (−1) −3
7 Round 1.982 to 2 d.p. 1.98
8 (−3) + (−6) −9
9 Round 0.2352 to 3 s.f. 0.235
10 Letter at (0, 1) H
Week 3
Session 1
Calculate your
Ninja Score to see
which Ninja Belt
you’ve earned
today!
Week 3 Session 2
Get your Skill Books ready…
You have 5 minutes to do as many
questions as possible.
Please time yourself.
Your time is up!
Get ready to mark your answers
Week 3 Session 2
Mental Strategies Answers
Q Question Answer
1 ☐ + 3 = 5 2
2 15 + 85 100
3 Halve 2 1
4 196 − 10 186
5 188 + ☐ = 260 72
6 62 = 32 + ☐ 30
7 604 − 601 3
8 8 × 4 = 32, so 32 ÷ 4 = ☐ 8
9 Write 05:48 in 12 hour clock format 5:48 am
10 From 22:06, how many minutes until 22:28? 22
Week 3 Session 2
Timestables Answers
Q Question Answer
1 4 × 4 = ☐ 16
2 8 ÷ 4 = ☐ 2
3 8 × ☐ = 16 2
4 5 ÷ ☐ = 1 5
5 6 × 8 = ☐ 48
6 9 ÷ 3 = ☐ 3
7 ☐ × 6 = 24 4
8 ☐ ÷ 2 = 10 20
9 7 × 6 = ☐ 42
10 70 ÷ 10 = ☐ 7
Week 3 Session 2
Key Skills Answers
Q Question Answer
1What is the highest common factor of 29 and
22?1
2 What is 3/4 of 40? 30
3 6 × 564 3384
4 14786 − 8106 6680
5 9.4 × 7.4 69.56
6 2/10 as a decimal number 0.2
7 34.53 + 6.2 40.73
8 (−1) ÷ 1 −1
9If a = 4 b = 1 and c = 2, what is the value of
3a / 2 ?6
10 1 − (−2) 3
Week 3
Session 2
Calculate your
Ninja Score to see
which Ninja Belt
you’ve earned
today!
Week 4 Session 1
Get your Skill Books ready…
You have 5 minutes to do as many
questions as possible.
Please time yourself.
Your time is up!
Get ready to mark your answers
Week 4 Session 1
Mental Strategies Answers
Q Question Answer
1 ☐ + 8 = 10 2
2 What is double 8? 16
3 Halve 36 18
4 163 + 40 203
5 41 + 42 83
6 13 + 10 = 13 + 7 + ☐ 3
7 4 + 844 848
8 56 + 23 = 56 + 20 + ☐ 3
9 177 + 10 187
10 83 − 20 63
Week 4 Session 1
Timestables Answers
Q Question Answer
1 10 × 10 = ☐ 100
2 56 ÷ 8 = ☐ 7
3 4 × ☐ = 4 1
4 60 ÷ ☐ = 10 6
5 1 × 7 = ☐ 7
6 30 ÷ 6 = ☐ 5
7 ☐ × 2 = 6 3
8 ☐ ÷ 4 = 8 32
9 9 × 2 = ☐ 18
10 56 ÷ 8 = ☐ 7
Week 4 Session 1
Key Skills Answers
Q Question Answer
1What is the lowest common multiple of 2 and
3?6
2 What is 75% of £120? £90
3 237 ÷ 3 79
4 8 + 6 × 3 26
5 631.47 ÷ 7 90.21
6 1000 × 9.23 9230
7 88.87 − 3.68 85.19
8 Write 27/72 in its simplest form 3/8
9 (−2) + 2 0
10 See number line 0.3
0
1
2
3
4
5
0 1
Value of the dot?
Week 4
Session 1
Calculate your
Ninja Score to see
which Ninja Belt
you’ve earned
today!
Week 4 Session 2
Get your Skill Books ready…
You have 5 minutes to do as many
questions as possible.
Please time yourself.
Your time is up!
Get ready to mark your answers
Week 4 Session 2
Mental Strategies Answers
Q Question Answer
1 ☐ + 12 = 20 8
2 Double 11 22
3 11 + 10 21
4 173 − 50 123
5 7 = 5 + ☐ 2
6 30 − 11 = 30 − 10 − ☐ 1
7 48 + 48 + 48 + 48 + 48 = ☐ × 48 5
8 What time is shown on the clock? 6:25 am
9 148 − 10 138
10 160 + 70 230
Week 4 Session 2
Timestables Answers
Q Question Answer
1 9 × 1 = ☐ 9
2 3 ÷ 3 = ☐ 1
3 2 × ☐ = 18 9
4 18 ÷ ☐ = 3 6
5 1 × 10 = ☐ 10
6 30 ÷ 6 = ☐ 5
7 ☐ × 2 = 2 1
8 ☐ ÷ 2 = 5 10
9 1 × 4 = ☐ 4
10 36 ÷ 9 = ☐ 4
Week 4 Session 2
Key Skills Answers
Q Question Answer
1 What is the value of (−3) cubed? −27
2 1/7 = ☐/70 10
3 6286 + 2044 8330
4 12 + 2 × 4 9
5Write Three Million, Nine Hundred and Fifty Two
Thousand, Seven Hundred and Twenty in digits3952720
6 5.9 ÷ 1000 0.0059
7 6 × (−1) −6
8 Round 5.3443 to 1 d.p. 5.3
9 (−4) + (−3) −7
10 Round 0.5056 to 1 s.f. 0.5
Week 4
Session 2
Calculate your
Ninja Score to see
which Ninja Belt
you’ve earned
today!
Week 5 Session 1
Get your Skill Books ready…
You have 5 minutes to do as many
questions as possible.
Please time yourself.
Your time is up!
Get ready to mark your answers
Week 5 Session 1
Mental Strategies Answers
Q Question Answer
1 1 + 4 5
2 22 + 78 100
3 What is half of 4? 2
4 156 − 10 146
5 70 + ☐ = 80 10
6 106 = 46 + ☐ 60
7 417 − 412 5
8 8 × 5 = 40, so 40 ÷ 5 = ☐ 8
9 Write 09:37 in 12 hour clock format 9:37 am
10 8:35 am is how many minutes after 7:44 am? 51
Week 5 Session 1
Timestables Answers
Q Question Answer
1 3 × 8 = ☐ 24
2 32 ÷ 4 = ☐ 8
3 5 × ☐ = 45 9
4 40 ÷ ☐ = 4 10
5 1 × 4 = ☐ 4
6 18 ÷ 2 = ☐ 9
7 ☐ × 4 = 16 4
8 ☐ ÷ 10 = 8 80
9 7 × 8 = ☐ 56
10 54 ÷ 9 = ☐ 6
Week 5 Session 1
Key Skills Answers
Q Question Answer
1 2 − (−8) 10
2 Letter at (2, 1) J
3 What is 2/5 of 45? 18
4 13 × 80 1040
5 1112 − 654 458
6 6 × 79.89 479.34
7 1.594 = ☐% 159.4
8 17 + 5.7 22.7
9 (−80) ÷ (−8) 10
10If a = 1 b = 3 and c = 1, what is the value of
√(a + b)2 (or −2)
Week 5
Session 1
Calculate your
Ninja Score to see
which Ninja Belt
you’ve earned
today!
Week 5 Session 2
Get your Skill Books ready…
You have 5 minutes to do as many
questions as possible.
Please time yourself.
Your time is up!
Get ready to mark your answers
Week 5 Session 2
Mental Strategies Answers
Q Question Answer
1 ☐ + 9 = 10 1
2 What is double 4? 8
3 What is half of 93? 46.5
4 50 + 80 = ☐ 130
5 156 + ☐ = 160 4
6 65 + 63 = ☐ 128
7 7 = 3 + ☐ 4
8 57 + 10 = 57 + 3 + ☐ 7
9 6 + 808 = ☐ 814
10 84 + 61 = 84 + 60 + ☐ 1
Week 5 Session 2
Timestables Answers
Q Question Answer
1 10 × ☐ = 20 2
2 60 ÷ ☐ = 6 10
3 24 ÷ ☐ = 6 4
4 ☐ ÷ 4 = 5 20
5 6 × ☐ = 54 9
6 7 × ☐ = 63 9
7 56 ÷ 7 = ☐ 8
8 ☐ × 10 = 30 3
9 5 × ☐ = 20 4
10 ☐ ÷ 2 = 6 12
Week 5 Session 2
Key Skills Answers
Q Question Answer
1 355 ÷ 5 = ☐ 71
2 3 + 2 ÷ 1 5
3 2 ÷ 0.1 20
4 0.51 × 100 51
5 85.338 − 6.39 78.948
6 Simplify 9/12 3/4
7 Which is the highest number, 3 or −7? 3
8 Value of the dot 45
9 What is the value of 122? 144
10 What is 80% of £180? £144
Week 5
Session 2
Calculate your
Ninja Score to see
which Ninja Belt
you’ve earned
today!
Week 6 Session 1
Get your Skill Books ready…
You have 5 minutes to do as many
questions as possible.
Please time yourself.
Your time is up!
Get ready to mark your answers
Week 6 Session 1
Mental Strategies Answers
Q Question Answer
1 20 = ☐ + 5 15
2 What is double 99? 198
3 150 + 10 = ☐ 160
4 119 − 50 = ☐ 69
5 21 + 20 = ☐ 41
6 6 = 4 + ☐ 2
7 24 = 14 + ☐ 10
8 16 − 8 = 16 − 6 − ☐ 2
9 8 + 8 + 8 + 8 + 8 = ☐ × 8 5
10 Draw hands on the clock face showing 7:35
pm See clock above
Week 6 Session 1
Timestables Answers
Q Question Answer
1 ☐ ÷ 6 = 7 42
2 ☐ × 4 = 36 9
3 ☐ ÷ 3 = 8 24
4 56 ÷ ☐ = 8 7
5 63 ÷ ☐ = 9 7
6 2 × 5 = ☐ 10
7 ☐ × 6 = 30 5
8 3 × ☐ = 27 9
9 9 × ☐ = 63 7
10 ☐ × 6 = 36 6
Week 6 Session 1
Key Skills Answers
Q Question Answer
1 8061 + 3290 11351
2 (3 + 57) ÷ 6 10
3 Write Sixty One Thousand, Five Hundred
and Sixteen in digits 61516
4 73.45 ÷ 1000 0.07345
5 (−1) × 4 −4
6 Round 0.3441 to 2 decimal places 0.34
7 4 + (−2) 2
8 Round 0.001882 to 1 s.f. 0.0019
9 What is the value of ∛27? 3
10 6/3 = ☐/18 36
Week 6
Session 1
Calculate your
Ninja Score to see
which Ninja Belt
you’ve earned
today!
Week 6 Session 2
Get your Skill Books ready…
You have 5 minutes to do as many
questions as possible.
Please time yourself.
Your time is up!
Get ready to mark your answers
Week 6 Session 2
Mental Strategies Answers
Q Question Answer
1 3 + ☐ = 5 2
2 ☐ + 63 = 100 37
3 Halve 2 1
4 40 − 10 = ☐ 30
5 27 + ☐ = 30 3
6 106 = 76 + ☐ 30
7 1588 − 1581 = ☐ 7
8 4 × 9 = 36, so 36 ÷ 9 = ☐ 4
9 What is 23:05 in 12 hour clock format? 11:05 pm
10 What time was it 51 minutes before 4:28
pm? 5:19 pm
Week 6 Session 2
Timestables Answers
Q Question Answer
1 40 ÷ ☐ = 4 10
2 54 ÷ 6 = ☐ 9
3 ☐ × 2 = 14 7
4 7 × 6 = ☐ 42
5 ☐ × 7 = 56 8
6 ☐ × 5 = 25 5
7 15 ÷ ☐ = 5 3
8 ☐ × 7 = 35 5
9 ☐ ÷ 2 = 9 18
10 3 × 9 = ☐ 27
Week 6 Session 2
Key Skills Answers
Q Question Answer
1 62 × 34 = ☐ 2108
2 9445 − 7651 1794
3 8.6 × 4.1 35.26
4 50% as a fraction 1/2
5 6.97 + 4.89 11.86
6 (−20) ÷ (−2) 10
7 If a = 7 b = 3 and c = 3, what is the value of
3b2 ?27
8 (−4) − (−2) −2
9 What is the letter at (1, 0)? N
10 What is 9/10 of 30? 27
Week 6
Session 2
Calculate your
Ninja Score to see
which Ninja Belt
you’ve earned
today!
