Question

A) (3-4,72)*(-5,12-4,38)+3,25*(-7,4)= в) (0,34-2,59)*7,8+2,9*(4,31-0,79)=

Answer 1

(3-4,72)*(-5,12-4,38)+3,25*(-7,4)=7,71
1) 3 - 4,72= -1,72
2) -5,12 - 4,38 = -9,5
3) - 1,72 * (-9,5) = 16,34
4) 3,25 * (-7,4) =  - 24,05
5) 16,34 - 24,05 = 7,71

(0,34-2,59)*7,8+2,9*(4,31-0,79)= - 7,342
1) 0,34-2,59 = - 2,25
2) -2,25 * 7,8 = - 17,55
3) 4,31-0,79 = 3,52
4) 2,9 * 3,52 = 10,208
5) - 17,55 + 10,208 = -7, 342

Answer 2

А) = -1,72*(-9,5)-24,05=16,34-24,05=-7,71
б) = -2,25*7,8+2,9*3,52=-17,55+10,208=-7,342