a/
$(-25).21.(-2)^{2}.(-|-3|.$ $(-1)^{2n+1}$ ($n∈N^*$)
⇔$(-25).21.4.(-3).(-1)^{}$
⇔$(-25).84.3^{}$
⇔$(-25).252$
⇔-6300
b/
$(-5)^3.67.(-|-2^3|).(-1)^{2n}$ ($n∈N^{*}$ )
⇔$-125.67.(-8).1$
⇔$-8375.(-8)$
⇔$-67000$
c/
$35.18-5.7.28$
⇔$35.18-35.28$
⇔$35(18-28)$
⇔$35.(-10)$
⇔$-350$
d/
$24(16-5)-16(24-5)$
⇔$24.16-24.5-16.24+16.5$
⇔$(24.16-16.24)+(-24.5+16.5)$
⇔$0+5(-24+16)
⇔$5.(-8)$
⇔$-40$
e/
$29(19-13)-19(29-13)$
⇔$29.19-29.13-19.29+19.13$
⇔$(29.19-19.29)+(-29.13+19.13)$
⇔$0+[13(-29+19)]$
⇔$13.(-10)$
⇔$-130$
$#minosuke$
Cho mk xin hay nhất ạ!
Và vote 5* nữa nhé!
