Question

(-172)+56+(-26)+72

Tính hợp lý

Answer 1

=[(-172)+72]+{56+(-26)
=-100+30
=-70

Answer 2

(-172)+56+(-26)+72 

= [(-172)+72] + [56+(-26)]

=-100+30

=-(100-30)

=-70 

Chúc bn hk tốt!

Answer 3

(-172) + 56 + (-26) + 72

= [(-172) + 72] + [56+(-26)]

= -100 + 30

= -70

Answer 4

\(\left(-172\right)+56+\left(-26\right)+72\)

\(=\left[\left(-172\right)+72\right]+\left[56+\left(-26\right)\right]\)

\(=-100+30=-70\)

Answer 5

( - 172 ) + 56 + ( - 26 ) + 72

= [ ( - 172 ) + 72 ] + [ 56 + ( - 26 )

= - 100 + 30

= - 70

Answer 6

- 172 + 56 + ( - 26 ) + 72

= - 172 + 72 + 56 + ( - 26 )

= - 100 + 30

= - 70

Answer 7

( -172 ) + 56 + ( -26 ) + 72

= -172 + 56 - 26 + 72

= ( -172 + 72 ) + ( 56 - 26 )

= -100 + 30 

= -70