Question

c/ |-8 | + (-2)3

d/ -887.(113 + 457) + 113.(887 - 457)

e) (16 + 39 ) + (158 – 16 – 39)

nhanh mik tick

Answer 1

c. TH1:/-8/=8

=8+(-2).3

=8-6=2

TH2:/-8/=8

=-8+(-2).3

=-8.(-6)

=-48

d.-887.(113+457)+113(887-457)

=-887.570+113.430

=-505590+48590

=-457000

e.(16+39)+(158-16-39)

=55+103

=158

Answer 2

c, \(\left|-8\right|+\left(-2\right).3\) => \(8+\left(-6\right)\) = \(2\)

d, \(-887.\left(113+457\right)+113.\left(887-457\right)\)

=> \(\left(-887\right).113+\left(-887\right).457+113.887-113.\left(457\right)\)

=> \(\left[\left(-887\right).113+113.887\right]+\left[\left(-887\right).457-113.457\right]\)

=> \(\left[113.\left(887-887\right)\right]+\left[457.\cdot\left(-113-887\right)\right]\)

=> \(\left[113.0\right]+\left(457.-1000\right)\)

=> \(0+-457000=-457000\)

e, \(\left(16+39\right)+\left(158-16-39\right)\)

=> \(\left(16+39+158-16-39\right)\)

=> \(\left(16-16\right)+\left(39-39\right)+158\)

=> \(0+0+158=158\)