Question

Помогите пожалуйста
1. 4,7-(-2)-(-1,5)
2. 1 29 - 1 13 + 1 518
3. -7 215 + 4 16 - 1,2

Answer 1

1) 4,7-(-2)-(-1,5)= 4,7+2+1,5= (4,7+1,5)+2=6,2+2=6,2+2,0=8,2.
2) 129 -113 +1518 = 43-113 +56 =(2*4 -2*11 +1*5)6 = (8-22+5)6=
= (13-22)6 = (-9)6 =-32 = -1,5.
3) -7 215 + 4 16 - 1,2 =-7 215 + 4 16 - 1 15 = (-7+4-1) +( 215+16 -15)=
= -4+(-2*2+5*1-6*1)30 = -4 +(-4+5-6)30= -4 +(-5)30=-4-16= -4 16/