Răspuns:
64:(4+4)=
64÷8=8
27:3+(4+12×2):4
9+(4+24):4=
9+28:4=
9+7=16
(22+26):2=
48:2=24
42:7 + (84: 4 + 3 x 9) 3-72:8=
6+(21+27)×3-9
=6+48×3-9
6+144-9=150-9=141
c. 150 - (25 +25) x 2
150-50×2
150-100=50
g. 12 x 9 + (25-5 5): 10 - 12 x 9
108+0:10-108
108+0-108=0
d. (15 + 25): 5 - 10:5
40:5-2
8-2=6
h. (99:9 +23 x 3):10+10:10:1
(11+69):10+1
70:10+1=7+1=8