Tens and ones using addition
1 Drawbase 10 to complete thepart-wholemodel.
Complete the sentences.
There are tensand ones.
The whole is
+ =
2 Complete the sentences todescribeeachnumber.
a) 39has tensand ones.
b) 70has tensand ones.
c) 12has tenand ones.
d) 56has tensand ones.
3 Complete thenumber sentences todescribeeachnumber.
Thefirstonehasbeendone foryou.
a) 39= 30 + 9
b) 70= +
c) 12= +
d) 56= +
4 Dexterhas30 sweetsandDorahas28 sweets.
Represent the totalnumberof sweets:
• using base10
• as apart-wholemodel
• as anumber sentence.
©WhiteRoseMaths2019
6 Complete thenumber sentences.
a) 35=30+ e) 19+20=
b) 20+ =29 f) 67=50+
c) 42=2+ g) 99= +39
d) 50+7= h) 40+30+ =81
7 Annie thinks that50+9=509
Show thatAnnie iswrong.
HowwouldyouhelpAnnie toget it rightnext time?
Talkabout itwithapartner.
8 Complete thenumber sentence.
30+ =20+
Compareyouranswerwithapartner’sanswer.
Howmanydifferentways canyou complete
thenumber sentence?
5 Complete thepart-wholemodels.
Write fournumber sentences tomatcheach
part-wholemodel.
a)
+ =
+ =
= +
= +
b)
+ =
+ =
= +
= +
©WhiteRoseMaths2019
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