Question

4и 3/7*14 2 и 5/9*9 3 и 4/21*7 2 и 11/18*6 решите подалуйста, !

Answer 1

1) 3/4+5/7=21/28+20/28=
=41/28=1 13/28
2) 9/14-3/4=18/28-21/28=-3/28
3) 11/12-2/3=11/12-8/12=3/12=
=1/4
4) 7/25+4/10=14/50+20/50=
=34/50=17/25
5) 11/18-5/12=22/36-15/36=
=7/36
6) 13/18+7/15=65/90+42/90=
=107/90=1 17/90
7) 19/24-25/36=57/72-50/72=
=7/72
8) 5/6-3/4+5/24=
=20/24-18/24+5/24=7/24
9) 5/8+11/28-9/14=
=35/56+22/56-36/56=21/56

Answer 2

$4 \frac{3}{7} \times 14 = \frac{31}{7} \times \frac{14}{1} = 62$
$2 \frac{5}{9} \times 9 = \frac{23}{9} \times \frac{9}{1} = 23$
$3 \frac{4}{21} \times 7 = \frac{67}{21} \times \frac{7}{1} = \frac{67}{3} = 22 \frac{1}{3}$
$2 \frac{11}{18} \times 6 = \frac{47}{18} \times \frac{6}{1} = \frac{47}{3} = 15 \frac{2}{3}$
Либо там неравенства (просто я немного не понял, что нужно именно):
$4 < \frac{3}{7} \times 14 \\ 4 < 6$
$2 < \frac{5}{9} \times 9 \\ 2 < 5$
$3 \frac{4}{21} \times 7 \\ 3 \frac{4}{3} \\ 3 1 \frac{1}{3}$
$2 < \frac{11}{18} \times \\ 2 < \frac{11}{3} \\ 2 < 3 \frac{2}{3}$