Вычислите.80:10 - 60 : 6 = (12 + 30) : (16 - 9) = 63 : 7 * ( 90 : 9 ) =81 - 8 * 9 =

Question

Вычислите.


80:10 - 60 : 6 =
(12 + 30) : (16 - 9) =
63 : 7 * ( 90 : 9 ) =
81 - 8 * 9 =

Answer 1

80:10 - 60 : 6 = -2
1) 80:10=8
2) 60:6=10
3) 8-10=-2

(12 + 30) : (16 - 9) = 6
1) 12+30=42
2) 16-9=7
3) 42:7=6

 63 : 7 * ( 90 : 9 ) =90
1) 90:9=10
2) 63:7=9
3) 9*10=90

81 - 8 * 9 =9
1) 8*9=72
2) 81-72=9

Answer 2

80:10=8. 60:6=10. 8-10=-2
12+30=42. 16-9=7. 42:7=6
90:9=10. 63:7=9. 9*10=90
8*9=72. 81-72= 9