Matthew Soon's answer to Mandy's Primary 6 Maths Fractions Singapore question.
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If you don't mind algebra...
Green = x
Red = x + 235
After bursting, balloons remaining add up to 92, so...
Green remaining + red remaining = 92 ;
(1/4)x + (1/5)(x + 235) = 92
1/4x + 1/5x + 47 = 92
9/20x = 45
x = 100
Original balloons = 2(100) + 235 = 435
Green = x
Red = x + 235
After bursting, balloons remaining add up to 92, so...
Green remaining + red remaining = 92 ;
(1/4)x + (1/5)(x + 235) = 92
1/4x + 1/5x + 47 = 92
9/20x = 45
x = 100
Original balloons = 2(100) + 235 = 435
Date Posted:
3 years ago
Algebra method is easier to understand. Tks
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