Mimosa's answer to Rhea's Primary 6 Maths Ratio Singapore question.
Can I ask why do we have to change both equation to 12 parts?
equation 3 minus equation 4 ...
12part - 12part = 0
this way, we remove "part" and left with "unit" to work on
12part - 12part = 0
this way, we remove "part" and left with "unit" to work on
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