cái này dễ mak bn,hok lý thuyết ik,nhưng mk bt là bn bt lm bài này
1) 13-18-(-42)-15
=13-18+42-15
=22
1) 13-18-(-42)-15
= 13-18+42-15
= 22
2) 369-4[(-5)+4.(-8)]
= 369-4(-5-32)
=369+20-128
=261
3) (-8)³ :_(-8)²+8( đề cứ sao sao ấy bạn :D)
4) (-12).(-13)+13.(-29)
=13(12-29)
=13.-17
=-221
1) 13-18-(-42)-15
= 13-18+42-15
= 22
2) 369-4[(-5)+4.(-8)]
= 369-4[-5-32]
=369+20-128
=261
3) (-8)³ :(-8)²+8
=-8+8
=0
4) (-12).(-13)+13.(-29)
=12.13+13.(-29)
=13(12-29)
=13.(-17)
=-221
a,\(13-18-\left(-42\right)-15\)
\(=13-18+42-15\)
\(=-5+42-15\)
\(=42-20=22\)
b,\(369-4\left[\left(-5\right)+4.\left(-8\right)\right]\)
\(=369-4\left[\left(-5\right)+\left(-32\right)\right]\)
\(=369-4.\left(-37\right)\)
\(=369-\left(-148\right)\)
\(=369+148=517\)
c,\(\left(-8\right)^3:\left(-8\right)^2+8\)
\(=-8+8=0\)
d,\(\left(-12\right).\left(-13\right)+13.\left(-29\right)\)
\(=12.13+13.\left(-29\right)\)
\(=13.\left(-29+12\right)\)
\(=13.\left(-17\right)\)
\(=-221\)
