1) (3 1/3+2,5)*(4,6-2 1/3)
2)(4,5*1 2/3-6,75)*(1. 1/3)3
ришить

Пошаговое объяснение:

1.

1) 3. 1/3 + 2,5 = 3. 1/3 + 2. 5/10 = 3. 10/30 + 2. 15/30 = 5. 25/30 = 5. 5/6

2) 4,6 - 2. 1/3 = 4. 6/10 - 2. 1/3 = 4. 18/30 - 2. 10/30 = 2. 8/30 = 2. 4/15

3) 5. 5/6 * 2. 4/15 = 35/6 * 34/15 = 7/3 * 17/3 = 119/9 = 13. 2/9

2.

1) 4,5 * 1. 2/3 = 4. 5/10 * 1. 2/3 = 45/10 * 5/3 = 15/2 * 1/1 = 15/2 = 7,5

2) 7,5 - 6,75 = 0,75

3) 0,75 * 1. 1/3 = 75/100 * 4/3 = 3/4 * 4/3 = 12/12 = 1