Download - Revision: Decimals (Part 1) · 2020. 10. 24. · SAPMATP4_W48 Page 3/4. Taken from Learning Maths Book 4B Revision: Decimals (Part 2) Estimate the value of each of the following by

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SAPMATP4_W48Page 1/4

Taken from Learning Maths Book 4B

Express each decimal in thousandths.

1. 28.404= thousandths





Solutions:

3. 53 936

53.936 = 53 936 _____ 1000 = 53 ones 936 thousandths

= 53 936 thousandths

4. 2308


= 2308 thousandths

5. 66 799

66.799 = 66 799 ___ 1000 = 66 ones 799 thousandths


2. 40 687



28404

Revision: Decimals (Part 1)

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Solutions: 1.3.45× 310.35

1 12. 0.78

× 97.02

7 73. 12.36

× 561.80

3 114. 50.12

× 2100.24

5. 21.55× 6129.30

3 3


Multiply these decimals.

1. 3. 4 5 4. 5 0. 1 2 × 3 × 2

2. 0. 7 8 5. 2 1. 5 5

× 9 × 6

3. 1 2. 3 6 × 5

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Estimatethevalueofeachofthefollowingbyfirstroundingoffthenumbertothenearestwholenumber.Thendecodethemessageonthenextpage.

A 26.54+92.88=

C 84.05–77.13=

D 5.4×8=

E 11.99÷3=

I 125.09+68.01=

L 524.87–128.39=

M 44.19×5=

S 35.59÷6=

40 4 7 193 220 120 397 6

Solutions: (A)26.54+92.88≈27+93=120

(C)84.05–77.13≈84–77=7(D)5.4×8≈5×8=40

(E)11.99÷3≈12÷3=4

(I)125.09+68.01≈125+68=193

(L)524.87–128.39≈525–128=397(M)44.19×5≈44×5=220

(S)35.59÷6≈36÷6=6

DECIMALS

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Taken from Mental Mathematics Book 4

Do these sums mentally.

Do not reduce the answers to the lowest terms.

1. 28193+45197 =

2. 1__3 + 1__9 =

3. 173.15÷100 =

4. 1__4 – 1__5 =

5. 53×0.9 =

6. 73×77 =

7. 91×91 =

8. 100.36×10 =

9. 34×34 =

10. 13491–10599 =

Solutions: 1. 73 390 2. 4 __ 9 3. 1.7315 4. 1 ___

20 5. 47.7 6. 5621 7. 8281 8. 1003.6 9. 1156 10. 2892

Mental Maths: GENERAL REVISION 11