Wong YX's answer to C y's Primary 5 Maths Rate & Ratio Singapore question.
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The first 20 T-shirts cost $12 each,
1 shirt → $12
20 shirts → $12 x 20 = $240
For the rest of the T-shirts, they cost:
$429 - $240 = $189
For the rest of the T-shirts, each shirt costs $9.
1 shirt → $9
? shirts → $189
To find the number of shirts (the ‘?’):
$189 ÷ $9 = 21
Total number of T-shirts:
20 + 21 = 41
1 shirt → $12
20 shirts → $12 x 20 = $240
For the rest of the T-shirts, they cost:
$429 - $240 = $189
For the rest of the T-shirts, each shirt costs $9.
1 shirt → $9
? shirts → $189
To find the number of shirts (the ‘?’):
$189 ÷ $9 = 21
Total number of T-shirts:
20 + 21 = 41
Date Posted:
4 years ago
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