Đáp án:
Giải thích các bước giải:
1) 75-(3.5^2-4.2^3)
=75-(3.25-4.8)
=75-( 75-24)
=75-75+24
=0+24
=24
2) (-17)+5+(-3)+17
=(-17)+5-3+17
=(-17+17)+(5-3)
=0+2=2
3) 13.(-7)
=-(13.7)
=-91
4) (-8).(-25)
=8.25
=100
5) 17.85+15.17-120
=17.(85+15)-120
=17.100-120
=1700-120
=1580
6) 2^3.17-2^3.14
=8.17-8.14
=8.(17-14)
=8.3
=24
7) 20-[30-(5-1)^2:2]
=20-[30-4^2:2]
=20-[30-16:2]
=20-[30-8]
=20-22
=-2
8) 174:{2.[36+(4^2-23)]}
=174:{2.[36+(16-23)]}
=174:{2.[36+(-7)]}
=174:{2.29}
=174:58
= 3
9) [(-15)+(-21)]-(25-15-35-21)
=(-15)+(-21)-25+15+35+21
=(-15+15)+(-21+21)+(-25+35)
=0+0+10
=10
10) (13-17)-(20-17+30+13)
=13-17-20+17-30-13
=(13-13)+(-17+17)+(-20+30)
=0+0+10
=10
11) 126+(-20)+ |124| -(-320)- |-150|
=126-20+124+320-150
=106+124+320-150
=230+320-150
=550-150
=400
12) (-1)+2-3+4-5+6-.......-99+100
=(-1+2)+(-3+4)+(-5+6)+.....+(-99+100)
=1+1+1+.....+1
=1.50
=50
tick mình nhé
