Вычислите:

1. 4-10/3

2. - 15+7/2

3. 12-12/-3

4. - 18-9/9

5. - 43+8/-5

6. - 20-4/-6

(-) и (-) = (+) ; (-) и (+) = (-)

Вычислите:

1. 4-10/3 = 4 - 3 1/3 = 3 3/3 - 3 1/3 = 2/3

2. - 15+7/2 = - 15 + 3 1/2 = - (14 2/2 - 3 1/2) =

-11 1/2;

В десятичных

-15 + 7/2 = - 15 + 3,5 = - (15-3,5) = - 11,5

3. 12-12/-3 = 12 - 12: (-3) = 12 + 4 = 16

4. - 18-9/9 = - 18 - 1 = - (18+1) = - 19

5. - 43+8/-5 = - 43 - 8/5 = - 43 - 1 3/5=

- (43+1 3/5) = - 44 3/5

6. - 20-4/-6 = - 20 - 4: (-6) = - 20 + 4/6=

-20 + 2/3 = - (20 - 2/3) = - (19 3/3 - 2/3) =

-19 1/3.