Question

[(9 x 9) x 3] + 38 =
[(520:5) + (28 x 8)] =
[(396-23) - 128 +43] x 3 =
1 000 - [45 x 7+ (34-9)]=
Dau coroana , repede

Answer 1

[(9 x 9) x 3] + 38 =81×3+38=243+38=281

[(520:5) + (28 x 8)] =104+224=328

[(396-23) - 128 +43] x 3 =(373-128+43)×3=(245+43)×3=288×3=864

1 000 - [45 x 7+ (34-9)]=1000-(315+25)=1000-340=660