Răspuns:
a) (8+9)×(80-69)=
17×11=187
b) 100:10×(7+3)=
100:10×10=
10×10=10
c) (7-7)×9+5×5×5=
=0×9+5×5×5=
=0+25×5
=0+125
=125
d) 89-35:(5+2)+43=
=89-35:7+43
=89-7+43
=82+43=125
e) (45+25-34):(56:8-1)
=(70-34):(7-1)
=36:6=6
f) 7×4+(87-79)×(36:4)
=7×4+8×9
=28+72
=100
g)47+5×(32-25)-8×7
=47+5×7-8×7
=47+35-56
=82-56
=26
h)36÷4×(63:9+6×7)-42:7
=36:4×(7+42)-6
=9×49-6
=441-6=435
(87+6×19+45:3)-(50×2+43×2)
(87+114+15)-(100+86)
(201+15)-186
216-186
30
