Question

30 БАЛЛОВ! :(
спросити вираз:
1) -16m•1,5n=
2) 2,6a-5,6b-a+2b=
3) -(7,4k)+(5,2k)=
4) 7a-6•(19-a)=

Answer 1

1) -16m × 1,5n = -24mn

2) 2,6a - 5,4b - a + 2b = 1,6a - 3,4b

3) -(7,4-k) + (5,2+k) = k - 7,4 + k + 5,2 = 2k -2,4k

4) 7a - 6(19-a) = 7a + 6a - 114 = 13a - 114