See sstrike's answer to Brayden's Primary 6 Maths Speed Singapore question

sstrike's answer to Brayden's Primary 6 Maths Speed Singapore question.

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Date Posted: 10 months ago

Comments 3 add a comment

Brayden

Brayden

10 months ago

Why 2 x 280?

Brayden

Brayden

10 months ago

Why 2 x 280?

sstrike

Sstrike

10 months ago

A=X+280
B=X-280
A-B=2×280