Вычислите (6 1/8 -1 3/4): (9-2 2/10(5 6/11-3 5/10))×1 - вопрос №618134922105611351012735612155912024105161267 от Вольха97 31.01.2020 06:46

Question

Математика: Вычислите (6 1/8 -1 3/4): (9-2 2/10(5 6/11-3 5/10))×1 2/7 (3 5/6-1 2/15)×5/9+((1/20+24/100)×8 1/3-1 1/6)×2

Вольха97 · Answer

(6 1/8-1 3/4):(9-2 2/10(5 6/11-3 5/10))*1 2/7=1 1/4

1) 6 1/8-1 3/4=6 1/8-1 6/8=4 3/8
2) 5 6/11-3 5/10=5 60/110-3 55/110=2 5/110=2 1/22
3) 2 2/10*2 1/22=22/10*45/22=45/10=9/2=4 1/2
4) 9-4 1/2=4 1/2
5) 4 3/8 : 4 1/2=35/8 * 2/9=35/36
6) 35/36 * 1 2/7=35/36 * 9/7=5/4=1 1/4

(3 5/6-1 2/15)*5/9+((1/20+24/100)*8 1/3-1 1/6)*2=4

1) 3 5/6-1 2/15=3 25/30-1 4/30=2 21/30=2 7/10
2) 2 7/10*5/9=27/10*5/9=3/2=1 1/2
3) 1/20+24/100=5/100+24/100=29/100
4) 29/100*8 1/3=29/100*25/3=29/12=2 5/12
5) 2 5/12-1 1/6=2 5/12-1 2/12=1 3/12=1 1/4
6) 1 1/4 * 2=2 1/2
7) 1 1/2+2 1/2=4