Question

22 6/7 ×2 11 /40

42 2/3: 4 20/27​

Answer 1

Пошаговое объяснение:

$1) \displaystyle 22\frac{6}{7}* 2\frac{11}{40}=\frac{22*7+6}{7}*\frac{2*40+11}{40}=\frac{160}{7}*\frac{91}{40}=\\ \\ \\ =\frac{40*4}{7}*\frac{7*13}{40} =4*13=52$

$2)\ \displaystyle 42\frac{2}{3}:4\frac{20}{27} =\frac{42*3+2}{3}:\frac{4*27+20}{27}=\\ \\ \\ =\frac{128}{3}: \frac{128}{27}= \frac{128}{3}*\frac{27}{128}=\frac{27}{3}=9$