1) (12 5/22+7 17/22) - (13 7/23-9 15/23) 2) 29 - вопрос №2374565112522717221372391523229495384953320162513 от mariyakarimova2 24.01.2021 19:06

Question

Математика: 1) (12 5/22+7 17/22) - (13 7/23-9 15/23) 2) 29 49/53 - 8 49/53 3) (20 16/25+13 9/25) - (23 4/14+7 13/14)

mariyakarimova2 · Answer

1) (12 5/22+7 17/22)-(13 7/23 - 9 15/23)=16 8/23
12 5/22 +7 17/22= 269/22+171/22=440/22=20
13 7/23 - 9 15/23 =306/23 - 222/23=84/23=3 15/23
20- 3 15/23= 20/1 - 84/23=(460-84)/23=376/23=16 8/23
2)29 49/53 - 8 49/53=1586/53 -473/53 =1113/53=21
3) (20 16/25+13 9/25)-(23 4/14 +7 13/14)=2 11/14
20 16/25+13 9/25=516/25 +334/25=850/25=34
23 4/14 + 7 13/14=(326+111)/14=437/14=31 3/14
34- 31 3/14=39/14=2 11/14