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primary 5 | Maths
| Whole Numbers
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How do I solve this? Thank you for your kind help in advance.
Date Posted: 5 years ago
Views: 269
Your second model is wrong.
After giving,
Pebbles that Yong has = 1u + 26 - 55
= 1u - 29
Pebbles that Fitria has = 1u + 55
Difference = 84 pebbles
Since Fitria has 3 times as many pebbles now, this means Fitria has 2 times more pebbles = 84
84 ÷ 2 = 42
42 x 3 = 126
Fitria has 126 pebbles now.
126 - 55 = 71
Fitria had 71 pebbles at first.
After giving,
Pebbles that Yong has = 1u + 26 - 55
= 1u - 29
Pebbles that Fitria has = 1u + 55
Difference = 84 pebbles
Since Fitria has 3 times as many pebbles now, this means Fitria has 2 times more pebbles = 84
84 ÷ 2 = 42
42 x 3 = 126
Fitria has 126 pebbles now.
126 - 55 = 71
Fitria had 71 pebbles at first.
Hi, thank you for helping me to solve this question. I am afraid I don't understand why Fitria has two times as many pebbles in the second part of the solution. Can I trouble you to explain this part please?
Fitria doesn't have 2 times as many. Fitria has 2 times more than Yong. '2 times as many' and '2 times more' are different.
Think of it this way:
Pebbles Yong now has → 1 part.
Fitria now has 3 times as many pebbles as Yong → 3 parts
Difference = 2 parts
So Fitria now has 2 times more pebbles than Yong
Think of it this way:
Pebbles Yong now has → 1 part.
Fitria now has 3 times as many pebbles as Yong → 3 parts
Difference = 2 parts
So Fitria now has 2 times more pebbles than Yong
Thank you. I will try to understand your explanation.
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The model for “after”.
Date Posted:
5 years ago
Thank you for your kind help!
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