Unit 13 – Number fluency
Let’s Try It 51 − = 50
51 +
= 60
61 −
= 60
61 +
= 70
52 −
= 50
52 +
= 60
62 −
= 60
62 +
= 70
Let’s Practise – 2 = 80
+ 8 = 90
– 3 = 80
+ 7 = 90
– 7 = 80
+ 3 = 90
– 7 = 70
+ 3 = 70
A B
C
D
0 10 20 30 40 50 60 70 80 90 100
Agree on an estimate for each number. What do you add to make the next 10?
177
SK_G2_SB_13_178-181.indd 177
01/12/2021 14:08
Made with FlippingBook Learn more on our blog