Question

Proszę o Pomoc zupełnie sobie nie radzę!!

Answer 1

1) -2,7 + (- 4/5) = -2,7 - 0,8 = -3,5

2) -5 1/15 - (-1,3) = -5 1/15 + 1,3= -5 1/15 + 1 3/10 = -5 2/30 + 1 9/30 = -4 32/30 + 1 9/30 =

= -3 23/30

3) 5,65 +(-9 1/5) = 5,65 - 9,2 = -3,55

4) -1 5/12 - (-3,125) = -1 5/12 + 3 1/8 = -1 10/24 + 3 3/24 = -1 10/24+ 2 27/24 = 1 17/24

5) -(-8,75) + (-3 1/3) = 8 3/4 - 3 1/3 = 8 9/12 - 3 4/12 = 5 5/12

6) -8 3/8 + (-2,45) = -8,375 - 2,45= -10,875

7) 4 2/3 * (-5,625) = 4 2/3 * (-5 5/8) = 14/3 * (-45/8) = -105/4 = -26 1/4

8) -5,25 * (-1 1/9) = -5 1/4 * (-1 1/9) = -21/4 * (-10/9) = 35/6 = 5 5/6

9) -1 1/9 * 1,2= -10/9 * 12/10 = -4/3= -1 1/3

10) 2,4 * (-3 1/8) = 2,4 * (-3,125) = -7,5

11) -3 1/3 * (-3,75) = -3 1/3 * (-3 3/4) = -10/3 * (-15/4) = 25/2= 12,5

12) -1,8 * 5 5/6 = -18/10 * 35/6 = -21/2= -10,5