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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