Răspuns:
3)
a) ( 2×27) ÷(3+7 -1 ) =
54 ÷ ( 10 -1) =
54 ÷9= 6
b)
5×(4 ÷2 +8 -2 )=
5× ( 2 +8-2) =
5 × ( 10 -2) =
5×8= 40
c)
(5×4)÷(2+8)-2=
20 ÷10 -2=
2-2 =0
d)
75÷(7 -2 ) +9 ×(15 -6)=
75 ÷ 5 +9 × 9=
15 +81= 96
e)
(100 ×6 ×6 -9×4)×0=
(600×6-9×4)×0=
( 3600 -36) ×0=
3564×0= 0
4)
a= 6×7 -5×5-72÷8
a = 42 -25 -9
a = 17-9
a= 8
b= 64÷8 +3×4-4×4
b = 8 + 12 -16
b= 20-16
b= 4
c = 42 ÷6 -16÷8
c= 7 -2
c=5
3 × 8 -2 x 4+5 =
24 - 8 +5 =
16+5 = 21
4× 8 -3 x4 +2 × 5=
32 -12 + 10=
20+10 = 30
21<30
