Решите пример: 2.5 + 1 2/3 - 3 1/6 = . - id645675020221013 от mariia1706 13.10.2022 14:49

Question

Математика: Решите пример: 2.5 + 1 2/3 - 3 1/6 = .

mariia1706 · Accepted Answer

(1 2/7*(-5/6)-2*1 2/7+5*(-5/6))*3+2(2*1 2/7*(-5/6)+3*1 2/7-6*(-5/6)
1)1 2/7*(-5/6)=9/7*(-5/6)=-45/42=-1 1/14
2)2*1 2/7=2/1*9/7=18/7=2 4/7
3)5*(-5/6)=5/1*(-5/6)=-25/6=-4 1/6
4)1 1/14-2 4/7=1 1/14-2 8/14=15/14-2 8/14=2 7/14=2 1/2
5)2 1/2+(-4 1/6)=2 3/6+(-4 1/6)=-4 1/6-2 3/6=-25/6-2 3/6=-2 22/6=-5 4/6=-5 2/3
6)2*1 2/7=2/1*9/7=18/7=2 4/7
7)2 4/7*(-5/6)=18/7*(-5/6)=-15/7=-2 1/7
8)3*1 2/7=3/1*9/7=27/7=3 6/7
9)6*(-5/6)=6/1*(-5/6)=-5
10)-2 1/7+3 6/7=1 1/7
11)1 1/7+5=6 1/7
12)-5 2/3*3=-17/3*3/1=-17
13)2*6 1/7=2/1*43/7=86/7=12 2/7
14)17+12 2/7=29 2/7
ответ:29 2/7

Решите пример: 2.5 + 1 2/3 - 3 1/6 = .

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