Question

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Am pus poza!

Answer 1

1.

(72-2)-(91-81)=70-10=60

2.

100-(27+42-6):7=100-(69-6):7=100-63:7=100-9=91

3.

(32+27+21):10:(40-36)=80:10:4=2

4.

56:(100-40-30-21-1)=56:8=7

5.

(24+12):4+7-(28-4):6=36:4+7-(24:6)=9+7-4=12

6.

(54:6×3-6×2)=(9×3-12):3=(27-12):3=15:3=5

7.

(2×3×3):2×(45:9+72:8-16:2)=18:2×(5+9-6)=9×8=72

8.

4×3+15-7×2+37-8×6=12+15-14+37-48=2

9.

19+(42-18)-18=19+24-18=25

10.

73-58+29-4=15+25=40

11.

24:8×3×4:6=3×3×4:6=36:6=6

12.

30+32:8+8×7-100:10=

30+4+56-10=

90-10=80

13.

20-(15-2+3):(26-18)=20-16:8=20-2=18

14.

40:5×3+32-32:8×7=

8×3+32-4×7=

24+32-28=

56-28=28

15.

89+64:8×7-28:7×4=

89+8×7-4×4=

89+56-16=129

16.

(25:5-7:7)+(36:9+8×0)=

(5-1)+(4)=8

17.

815-24:2:2=815-6=809

18.

12+6:(3+9:3)=12+6:(3+3)=12+6:6=12+1=13

19.

21-21:7×(4-5:5)=21-21:7×(4-1)=21-21:7×3=21-3×3=21-9=12