Question

-15 +(84+15-72)-(84-72)

Answer 1

-15 +(84+15-72)-(84-72)

=-15 +84+15-72-84+72

=0

Answer 2

-12 + (84+15-72) - (84-72)

= -12 + 84 + 15 - 72 - 84 + 72

= 0

Answer 3

        \(-15+\left(84+15-72\right)-\left(84-72\right)\)

\(=-15+84+15-72-84+72\)

\(=\left(-15+15\right)+\left(84-84\right)+\left(-72+72\right)\)

\(=0+0+0\)

\(=0\)

Answer 4

=-15+27-12

=-15+15

=0

Answer 5

= 0

h ktoto

Answer 6

= 0 

Hk tốt

Answer 7

= 0

Hk tốt

Answer 8

-15+(84+15-72)-(84-72)

-15+84+15-72-84+72

Answer 9

-15+(84+15-72)-(84-72)

=-15+84+15-72-84+72

=(-15+15)+(84+84)+(-72+72)

=0+0+0

=0