Question

Сделайте 2вариант 4,5,6,7, только

Answer 1

1. 42×7:3=98

2. 12/21у+5/21у-14/21у=3/21у=1/7у

3.(7 1/3 + 2 1/4) : 1/4 - 30 5/6 = 7 1/2

1) 7 1/3 + 2 1/4 = 7 4/12 + 2 3/12 = 9 7/12

2) 9 7/12 : 1/4 = 115/12 * 4 = 115/3 = 38 1/3

3) 38 1/3 - 30 5/6 = 38 2/6 - 30 5/6 = 37 8/6 - 30 5/6 = 7 3/6 = 7 1/2

4. 19.5-0.6=18.9

18.9-2/3=6.3-2=4.3