Which working is correct? I confused myself. Help please. Thank you!

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Primary 4 Maths Singapore

Which working is correct? I confused myself. Help please. Thank you!

Date Posted: 4 years ago

1-1/5-3/4=1/20

1u=224
20u=4480

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Date Posted: 4 years ago

Andrew

4 years ago

Thank you!!!

Andrew

4 years ago

Thanks!!!