Question

[Tran Minh]

Tính (-48)+127+(-52)+73 (-38)x45+(-38)x55 (-125)+371+(-875)+629+150 271+(-392)+729+(-608+(-123) (-48)x25+25x(-52) 47x(-11)+47 56-7x8+11 -42+51+2+(-11)+40

Answer 1

[HT.Phong (9A5)]

a) \(\left(-48\right)+127+\left(-52\right)+73\)

\(=\left(-48-52\right)+\left(127+73\right)\)

\(=-100+200\)

\(=100\)

b) \(\left(-38\right)\cdot45+\left(-38\right)\cdot55\)

\(=\left(-38\right)\cdot\left(45+55\right)\)

\(=\left(-38\right)\cdot100\)

\(=-3800\)

c) \(\left(-125\right)+371+\left(-875\right)+629+150\)

\(=\left(-125-875\right)+\left(371+629\right)+150\)

\(=-1000+1000+150\)

\(=150\)

d) \(271+\left(-392\right)+729+\left(-608\right)+\left(-123\right)\)

\(=\left(271+729\right)+\left(-392-608\right)-123\)

\(=1000-1000-123\)

\(=-123\)

e) \(\left(-48\right)\cdot25+25\cdot\left(-52\right)\)

\(=25\cdot\left(-48-52\right)\)

\(=25\cdot-100\)

\(=-2500\)

f) \(47\cdot\left(-11\right)+47\)

\(=47\cdot\left(-11+1\right)\)

\(=47\cdot-10\)

\(=-470\)

g) \(56-7\cdot8+11\)

\(=56-56+11\)

\(=0+11\)

\(=11\)

h) \(-42+51+2+\left(-11\right)+40\)

\(=\left(-42+2\right)+\left(51-11\right)+40\)

\(=-40+40+40\)

\(=0+40\)

\(=40\)

Answer 2

[Nguyễn Lê Phước Thịnh]

a: =-48-52+127+73

=200-100

=100

b; \(=-38\left(45+55\right)=-38\cdot100=-3800\)

c: \(=-125-875+371+629+150\)

=-1000+1000+150

=150

d: =271+729-392-608-123

=1000-1000-123

=-123

e: =25(-48-52)

=25*(-100)

=-2500

f: =47(-11+1)

=47(-10)

=-470

g: =56-56+11

=11

h: =-42+2+51-11+40

=-40+40+40

=40