Question

calculati: a)2×3/5 b)3×2/5 c)7×2/5 d)2×7/5 e)6×3/4 f)3×3/2 g)20×7/25 h)1/36×21​

Answer 1

Răspuns:

a)1.2 b)1.2 c)2.8 d)2.8 e)4.5 f)4.5 g)5.6 h)1.714

Explicație pas cu pas:

Answer 2

$2\cdot \frac{3}{5} =\frac{2\cdot \:3}{5} =\frac{6}{5}$

$3\cdot \frac{2}{5} =\frac{3\cdot \:2}{5} =\frac{6}{5}$

$7\cdot \frac{2}{5} =\frac{7\cdot \:2}{5} =\frac{14}{5}$

$6\cdot \frac{3}{4} =2\cdot \:3\cdot \frac{3}{4} =2\cdot \:3\cdot \frac{3}{2\cdot \:2}=3\cdot \frac{3}{2}=\frac{3\cdot \:3}{2}=\frac{9}{2}$

$3\cdot \frac{3}{2} =\frac{3\cdot \:3}{2}=\frac{9}{2}$

$20\cdot \frac{7}{5} =5\cdot \:4\cdot \frac{7}{5}=4\cdot \:7 =28$

$\frac{1}{36}\cdot \:21 =\frac{1}{36}\cdot \:3\cdot \:7 =\frac{1}{3\cdot \:12}\cdot \:3\cdot \:7 =\frac{1}{12}\cdot \:7 =\frac{1\cdot \:7}{12}=\frac{7}{12}$

Sper că te-am ajutat!

Succes!