Question

өрнектің мәнін табыңыз
2,2(7)÷18/82+1=
Амалдармен орында,есептеңіз
(6 1/8-1,75)÷(9-2,2×(5 6/11-3,5))×1 2/7=​

Answer 1

Пошаговое объяснение:

№1

2,2(7) = 2 (27-2)/90 = 2 25/90 = 2 5/18

2,2(7) : 18/82 + 1 = 2 5/18 : 18/82 + 1 =

41/18 * 82/18 + 1 = 41/9 * 41/18 + 1 =

1681/162 + 1 = 10 61/162 + 1 = 11 61/162

№2

1) 6 1/8 - 1,75 = 6,125 - 1,75 = 4,375

2) 5 6/11 - 3,5 = 5 6/11 - 3 5/10 = 5 60/110 - 3 55/110 = 2 5/110 = 2 1/22

3) 2,2 * 2 1/22 = 22/10 45/22 = 1/2 * 9/1 = 9/2 = 4,5

4) 9 - 4,5 = 4,5

5) 4,375 : 4,5 = 4 375/1000 : 4 5/10 = 4 3/8 : 4 1/2 = 35/8 : 9/2 = 35/8 * 2/9 = 35/4 * 1/9 = 35/36

6) 35/36 * 1 2/7 = 35/36 * 9/7 = 5/4 * 1/1 = 5/4 = 1 1/4