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How to write the second question on page 33 of the sixth grade mathematics in primary school mainly depends on the process. Thank you.
Like this:
1、3: 1.5=2
4:2=2
Because 2=2
So 3: 1.5 = 4: 2.
2、 1.5:3=0.5
2:4=0.5
Because 0.5=0.5
So 1.5: 3 = 2: 4.
(The proportion can also be written in fractional form. )