Page 20 - PlayFacto_B1

Addition and subtraction

Addition with regrouping (2-digit)+(1-digit)

1 1

18 18 18
+4
+4 +4
22
2

18+4=22

Subtraction with regrouping (2-digit)-(1-digit)

1 10 1 10 1 10

25 25 25 25

-8 -8 -8 -8
17
7

25-8=17

Example 1 Find the sum and difference. ⑵

⑴

18 + 6 = 23 - 7 =

Example 2 Find the sum or difference.

⑴ 2 5 ⑵ 3 6 ⑶ 37
+8 +7 -9

2. Remaker 17