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primary 5 | Maths
| Whole Numbers
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At first.. ? Doing backward? Is it 128-42 =2unit??
Can explain , how to arrival the answer
Date Posted: 2 years ago
Views: 290
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done
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Let the equal number bought for each red and blue be x.
Date Posted:
2 years ago
End= 42 (blue)
End= 42x3=126(Red)
Total at the end = 126+42 =168 (End)
FIRST total=128
End-FIRST = 168-128= 40 ( bought red+blue)
Red bought = 40 divide 2= 20
Red at first = 126 subtract- 20= 106 （at first)
End= 42x3=126(Red)
Total at the end = 126+42 =168 (End)
FIRST total=128
End-FIRST = 168-128= 40 ( bought red+blue)
Red bought = 40 divide 2= 20
Red at first = 126 subtract- 20= 106 （at first)
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