1.
2.
178 + 487 =
= (178 - 13) + (487 + 13)
= 165 = 500
= 665
or
100 + 400 = 500
70 + 80 = 150
8 + 7 = 15
= 500 + 150 + 15 = 665
6.
6 x 14
= (6 x 10) + (6 x 4)
= 60 + 24 = 84 pottles
3.
423 - 186
= 186 + __ = 423
= 186 + 14 = 200
= 200 + 223 = 423
so 14 + 223 = 237
423 - 186 = 237
7.
4.
2/8 of 32 like strawberry
5/8 of 32 like chocolate
1/8 of 32 likes lime
1/8 of 32 = 32 ÷ 8 = 4 (lime)
2/8 of 32 = 2 x 4 = 8 (strawberry)
5/8 of 32 = 5 x 4 = 20 (chocolate)
8.
a) 132 - 76 = 76 + __ = 132
= 76 + 24 = 130
= 130 + 32 = 132
24 + 32 = 56
so 76 + 56 = 132
b) 132 - 76 =
132 - 32 = 100
100 - 44 = 56
c) 132 - 76 =
132 - 100 = 32
32 + 24 = 56
5.
3/5 of 325
1/5 of 325 = 325 ÷ 5 =
5 x __ = 325
5 x 60 = 300
5 x 5 = 325
5 x 65 = 325
1/5 = 65 so 3/5 = 65 x 3 =
= (3 x 60) + (3 x 5)
= 180 + 15
= 195 brought bike
1/5 brought skateboard
= 65
12 x 13 =
=(10 x 13) + (2 x 13)
=130 + 26
= 156
176 ÷ 8 =
8 x __ = 176
8 x 20 = 160
8 x 2 = 16
8 x 22 = 176
176 ÷ 8 = 22