Explicație pas cu pas:
a) 2×2×2×a=8
a=1
b)8:4×b=10
b=5
c)c:(671-111×3×2)=70
C=350
d) 1000-d×2-25×4=800
d=50
e)e -40:2+29×4=132
e) 36
f) f:7+25=900-(300-48×5)×9
f=2345
a)2×2×2×a=8
8×a=8
a=8÷8
b)8÷4×b=10
2×b=10
b=10÷2
c)c÷(671-111×3×2)=70
c÷(671-666)=70
c÷5=70
c=70×5
c=350
d)1000-d×2-25×4=800
1000-d×2-100=800
1000-100-d×2=800
900-d×2=800
d×2=900-800
d×2=100
d=100÷2
e)e-40÷2+29×4=132
e-20+116=132
e-20=132-116
e-20=16
e=20+16
e=36
f)f:7+25=900-(300-48×5)×9
f÷7+25=900-(300-240)×9
f÷7+25=900-60×9
f÷7+25=900-540
f÷7+25=360
f÷7=360-25
f÷7=335
f=335×7
