## Friday, 21 June 2013

### Henry's Maths

1. Moana has \$81 and she gives her friend \$18. How much money does Moana have left?
18 + 2 = 20
20 + 60 = 80
80 + 1 = 81
18 + 63 = 81 so 81 - 18 = 63

1. Jake collected \$75 from his pocket money to buy a present for his mum. The present only costs \$39 so how much change does he have?
39 +1=40
40+30=70
70+5=75
39 + 36 =75 so 75 - 36=63
1. Dad takes \$93 with him to the fair. He comes back with \$57. How much did he spend?
57 +3=60
60 +30=90
90+3=93
so 57+36=93 so 93-57=36
At the park the lolly seller has collected in \$103.
She has to pay \$88 out for buying lollies for the next day. How much money does she have left?
88+2=90
90+10=100
100+3=103
so 103 -88=15
1. Sam has \$110 and spends \$89 on some playstation games he wanted. How much money does he have left?
89+1=90
90=20=110
so 110-89=21

1. I start shopping with \$64 and come home with \$38. How much did I spend when I was out shopping?
38+2=40
40 +20=60
60+4=64
so 64 -38 =26
The hard thing was counting in my head.
1. I wanted to collect \$100 for charity, but only managed to get \$82. How much less than \$100 is that?
82+8=90
90+10=100
so 100-82=18

We were learning that sometimes we can use our adding strategies to help us solve subtraction questions. I found counting in my head difficult.