Don't Subtract Add

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 ✔

2. 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

39 + 1 = 40

40 + 30 = 70

70 + 5 = 75

39 + 36 = 75 so 75 - 39 = 36✔

   3. 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

57 +36 = 93 so 93 - 57 = 36✔

4. 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

88 + 15 = 103 so 103 - 88 = 15✔

5.Sam has $110 and spends $89 on some playstation games he wanted. How much money does he have left?

89 + 1 = 90

90 + 10 = 100

100 + 10 = 110

89 + 21 = 110 so 110 - 89 = 21 ✔

6.  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

38 + 26 = 64 so 64 - 38 = 26✔

7. 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

100 - 82 = 18✔

The hard thing for me was:

Thinking in my head fast without using a calculator

Using Multiplication in my head

What I have learnt:

I have learnt to plus and to take away little numbers from big numbers

I have learnt to use more multiplication