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Secondary 1 | Maths
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Date Posted: 4 years ago
Views: 274
A faster way :
Notice that to get from 3 to 4½, you have to multiply by 1½ (or 1.5, or 3/2)
So for the 9/2, you multiply by 1½ to get y
y = 9/2 x 1½
= 9/2 x 3/2
= 27/4 (or 6¾ ,or 6.75)
Now for x, you do the reverse. Divide by 1½
x = 15/4 ÷ 1½
= 15/4 ÷ 3/2
= 15/4 x 2/3
= 5/2 (or 2½ , or 2.5)
Notice that to get from 3 to 4½, you have to multiply by 1½ (or 1.5, or 3/2)
So for the 9/2, you multiply by 1½ to get y
y = 9/2 x 1½
= 9/2 x 3/2
= 27/4 (or 6¾ ,or 6.75)
Now for x, you do the reverse. Divide by 1½
x = 15/4 ÷ 1½
= 15/4 ÷ 3/2
= 15/4 x 2/3
= 5/2 (or 2½ , or 2.5)
See 1 Answer
done
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Here you go. Trick to this type of question is to make the known ration the same for both sides and then compare the corresponding integers to get your answer.
Date Posted:
4 years ago
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