Question

25см2 50мм2-12см2 90мм2=

Answer 1

$25cm^2 50mm^2-12cm^2 90mm^2$

$1cm^2=100mm^2$

 

$25cm^2 50mm^2-12cm^2 90mm^2 = 2550 mm^2 - 1290 mm^2= 1260mm^2 = 12 cm^2 60 mm^2$

 

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