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Wednesday, 19 June 2013

Don't subtract Add:Isaac




  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=65 so 75-39=36

  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=39
   57+36=93 so 93-57=36
  1. At the park the lolly seller has collected in $103.
   
  1. 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=95 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+10=100
     100+10=110 89+21=100 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
      38+26=64 so 64+38=26
  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
100+0+100
82+18=100 so 100-82=18


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