Question

7. Calculați: 60 a) 1 + 64 : 8 : 2 + 72:9x5+9x5=105 45 b)2-(4-36:9:3)=7 10 10 c) (54 +46): 10 x (1 +63: 7) = 100 d) 8 x 4-(1+27:3+24:4+2 x 8) = e) 81:9 x (24:4+72:8-100: 10-35:7)= f) 10 x 3 - (12+72:8-4 x 4 ) x 8: (2x5)= K​

Answer 1

a) 1 + 64 : 8 : 2 + 72:9x5+9x5=
1 + 8:2 + 8 x5 + 45=
1 + 4 + 40 + 45 = 90

b)2-(4-36:9:3)=
2 - ( 4 - 36 : 3)=
2 - (4 - 12)=
2 - (-8)=10

c) (54 +46): 10 x (1 +63: 7) =
100 : 10 x (1+9)=
10 x 10= 100

d) 8 x 4-(1+27:3+24:4+2 x 8) =
32 - (1+9+6+16)=
32 - 32 = 0


e) 81:9 x (24:4+72:8-100: 10-35:7)=
819 x (6+9-10-5)=
819 x 0= 0

f) 10 x 3 - (12+72:8-4 x 4 ) x 8: (2x5)=
30 - (12+9-16) x 8 : 10=
30 - 5 x 8 : 10=
30 - 4 = 26