Question

calcule o valor das seguintes expressões :

28:7+4-1=

9×7-3+20:5=

{20+[8×(10:2)]-15

4×{2×[4×9-(9:3-2):5}=

Answer 1

28:7+4-1
4+4-1
8-1
7

9×7-3+20:5
63-3+4
60+4
64

{20+[8×(10:2)]-15
[20+(8×5)-15
20+40-15
60-15
45

4×{2×[4×9-(9:3-2):5}
4×2×4×9-(3-2):5}
16×18-(1)/5
288-1/5
(1440-1)/5
1439/5