Friday 22-02-19
PROBLEM
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Strategy
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Answer
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90x50=4500
90x40=3600
4500+3600=8100
5x90=450
8100-450=
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7650
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2.79x89=
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80x40=3200
80x40=3200
3200+3200=6400
80x9=720
6400+720=7120
1x89=89
7120-89=
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7031
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3.68x76=
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70x50=3500
70x20=1400
70x6=420
3500+1400+420=5320
2x76=152
5320-152=
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5168
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4.92x88=
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100x40=4000
100x40=4000
4000+4000=8000
100x8=800
8000+800=8800
8x88=704
8800-704=
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8096
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5.59x67=
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60x30=1800
60x30=1800
60x7=420
1800+1800+420=4020
1x67=67
4020-67=
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3953
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