3.(-4)^2+2.(-5)-20

(-54)+(+39)-(+10)+(-85

5.(3)^2-14.(-8)+(-40)

(-24)+(-30)-(-40)

31-[26-(209+26)]

29-(-25)+(+40)

231+26-(209+26) BÀI TẬP TẾT NHIỀU QUÁ MONG MN

215+(-38)-(-58)+90-85 GIÚP ĐỠ THANK..........

21+22+23+24-11-12-13-14

215+(-38)-(-58)-(-58)-15

tính hợp lý

a)5.(-3)^2-14.(-8)+(-40)

b)31-[26-(209+35)]

c)237+26-(209+26)

d)21+22+23+24-11-12-13-14

e)(-12).46-12.54

g)(-8).25.(-2).4.(-5).125

h)(-50+19+143)-(-79+25+48)

i)(-37-17).(-9)+35.(-9-11)

k)512.(2-128)-128.(-512)

l)160:{|-17|+[3^2.5-(14+2^11:2^8)]

m)|-6|+(-17)+|-4|+(-3)

n)5^6:5^3-5^0.5^1.5^2

o)100:{31-[24:(18-7.2)]}

k)

1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50=?

1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50.

1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50+51+52+53+54+56+57+58+59+60+61+62+63+64+65+66+67+68+69+70=?

Bài 1 : Tính nhanh

a) (-48)-72+36*(40-404)

b) 25*(-23)+47*(-35)-20*(-35)

c) 29*(67)-45*67+26*(67)

d) 4*(-5)-125*(-2)mũ 3+(-10) mũ 3*(-2)

Bài 2: Tính nhanh

a) (26-6)*(-4)+31*(-7-13)

b) (47-17)*(-5)+22*(-13-17)

c) (35-85)*11+29*(-14-36)

d) (153-53)*(-37)+37*(-42-58)

Giúp mình với nhé
 

1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50

NHỚ KẾT BẠN VỚI MÌNH NHA '-'