AC Lim's answer to Mike's Primary 5 Maths Fractions Singapore question.

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AC Lim
Ac Lim's answer
1871 answers (A Helpful Person)
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Hope this help
Mike
Mike
1 month ago
May i know why need times 3?
AC Lim
AC Lim
1 month ago
We need to eliminate either cake or pie, in this case, cake have more u. i.e 6u, so we choose to eliminate the pie. 3u, therefore we able to find cake 1u.

Total
Cake =6u
Pie=3u

Given 1cake and 1pie=80
3 cake + 3 pie = 240 (all time 3)

Total cake and pie = 300
3 cake + 3 cake +3 pie = 300
3 cake + ( 240) = 300 —-> 240 = 3cake +3pie

....
.... 1cake=20
Mike
Mike
1 month ago
Got it. Thank u so much.