Explicație pas cu pas:
1) 2+(-5)+10-6=2-5+10-6=1
3) -23+14-36+40+25=-59+14+40+25=-59+79=-20
5) |+3|+(-7)+|-4|= 3+(-7)+|-4|=3-7+|-4|=3-7+4=0
9) (-2)×(-4)×5=2×4×5=10×4=40
