1)2×2/3×9/32×5 1/3 2)6 1/4×1 1/35×2 1/3 3)18/25×10/27×7 1/2 4)12 6/7×2/25×7/18 5)8 1/3×2 1/5×1 1/11

Ответы

roma1xayatov 07.10.2020 10:13

1 будет 2
2 будет2
3 20
4 2/5
1)2×2/3×9/32×5 1/3 2)6 1/4×1 1/35×2 1/3 3)18/25×10/27×7 1/2 4)12 6/7×2/25×7/18 5)8 1/3×2 1/5×1 1/11

ПОКАЗАТЬ ОТВЕТЫ

zontikmily 07.10.2020 10:13

$1)2 \times \frac{2}{3} \times \frac{9}{32} \times 5 \frac{1}{3} = 2 \\ \\ 1)2 \times \frac{2}{3} = \frac{2 \times 2}{3} = \frac{4}{3} = 1 \frac{1}{3} \\ \\ 2)1 \frac{1}{3} \times \frac{9}{32} = \frac{4}{3} \times \frac{9}{32} = \frac{4 \times 9}{3 \times 32} = \frac{1 \times 3}{1 \times 8} = \frac{3}{8} \\ \\ 3) \frac{3}{8} \times 5 \frac{1}{3} = \frac{3}{8} \times \frac{16}{3} = \frac{3 \times 16}{8 \times 3} = \frac{1 \times 2}{1 \times 1} = \frac{2}{1} = 2$

$2)6 \frac{1}{4} \times 1 \frac{1}{35} \times 2 \frac{1}{3} = \frac{5}{12} \\ \\ 1)6 \frac{1}{4} \times \frac{1}{35} = \frac{25}{4} \times \frac{1}{35} = \frac{25 \times 1}{4 \times 35} = \frac{5 \times 1}{4 \times 7} = \frac{5}{28} \\ \\ 2) \frac{5}{28} \times 2 \frac{1}{3} = \frac{5}{28} \times \frac{7}{3} = \frac{5 \times 7}{28 \times 3} = \frac{5 \times 1}{4 \times 3} = \frac{5}{12}$

$3) \frac{18}{25} \times \frac{10}{27} \times 7 \frac{1}{2} = 2 \\ \\ 1) \frac{18}{25} \times \frac{10}{27} = \frac{18 \times 10}{25 \times 27} = \frac{2 \times 2}{5 \times 3} = \frac{4}{15} \\ \\ 2) \frac{4}{15} \times 7\frac{1}{2} = \frac{4}{15} \times \frac{15}{2} = \frac{4 \times 15}{15 \times 2} = \frac{2 \times 1}{1 \times 1} = \frac{2}{1} = 2$

$4)12 \frac{6}{7} \times \frac{2}{25} \times \frac{7}{18} = \frac{2}{5} \\ \\ 1)12 \frac{6}{7} \times \frac{2}{25} = \frac{90}{7} \times \frac{2}{25} = \frac{90 \times 2}{7 \times 25} = \frac{18 \times 2}{7 \times 5} = \frac{36}{35} = 1 \frac{1}{35} \\ \\ 2)1 \frac{1}{35} \times \frac{7}{18} = \frac{36}{35} \times \frac{7}{18} = \frac{36 \times 7}{35 \times 18} = \frac{2 \times 1}{5 \times 1} = \frac{2}{5}$

$5)8 \frac{1}{3} \times 2 \frac{1}{5} \times 1\frac{1}{11} = 22 \frac{8}{11} \\ \\ 1)8 \frac{1}{3} \times 2 \frac{1}{2} = \frac{25}{3} \times \frac{5}{2} = \frac{25 \times 5}{3 \times 2} = \frac{125}{6} = 20 \frac{5}{6} \\ \\ 2)20 \frac{5}{6} \times 1\frac{1}{11} = \frac{125}{6} \times \frac{12}{11} = \frac{125 \times 12}{6 \times 11} = \frac{125 \times 2}{1 \times 11} = \frac{250}{11} = 22 \frac{8}{11}$