Răspuns:
a)
45 + 15:5-18:3=45+3-6=48-6=42
106 - 5x4 - 4x9=106-20-36=86-36=50
b)
(81 + 19): 10 : 10 x 1=
100:10:10x1=
10:10x1=1x1=1
9x7 - (25 + 7 x3)=
63-(25+21)=
63-46=17
c)
(14 + 67): 9 + 21 + 3 x 7=
81:9+21+21=
9+21+21=
30+21=51
100 - (63:7 +56:8): 4=
100-(9+7):4=
100-16:4=
100-4=96