NURSARAH BINTE SUPRAT's answer to Joeljohnson's Primary 5 Maths question.
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Let your units be the number of legs.
Cows (4u)
Duck (2u)
Total units for cows -> 3x4u = 12u
Total units for ducks -> 8x2u=16u
Total units ->12u+16u= 28u
Total number of legs -> 28u = 252 legs
1u= 252 / 28 = 9
Total number of legs for ducks -> 16u=16x9 =144legs
One duck has 2u -> 144 / 2 = 72 ducks
There are 72 ducks.
Pls do your own checking on your calculator. Now, cows have 108 legs. Go back to the question
Cows (4u)
Duck (2u)
Total units for cows -> 3x4u = 12u
Total units for ducks -> 8x2u=16u
Total units ->12u+16u= 28u
Total number of legs -> 28u = 252 legs
1u= 252 / 28 = 9
Total number of legs for ducks -> 16u=16x9 =144legs
One duck has 2u -> 144 / 2 = 72 ducks
There are 72 ducks.
Pls do your own checking on your calculator. Now, cows have 108 legs. Go back to the question
Date Posted:
6 years ago
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