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Автор - MrAnastasia

5 4/7 : 1 5/21 - ( 5 2/15 * 3/22 + 1 14/15) =
Помогите даю 40 баллов срочно через 2 часа в школу, помогите!

Ответ

Автор - Viktor122
1) 5 4/7 :1 5/21 =39/7 *21/26=117/26=4,5
2)5 2/15 * 3/22=77/15*3/22=7/5*1/2=7/10
3) 7/10+1 14/15=21/30+1 28/30=1 48/30=2 18/30=2 3/5=2,6
4) 4,5-2,6=1,9

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