Question

calculati :a)2 supra 7× 21 supra 6
b)15 supra 45÷ 60 supra90​

Answer 1

$a) \frac{2}{7}*21=2*3=6\\b) \frac{15}{45}:\frac{45}{60}=\frac{15}{45}*\frac{60}{90}=\frac{1}{3}*\frac{2}{3}=\frac{2}{9}$