Question

bài 1 : Tính

a) 37+(-35)

b)20-(-21)

c)-57+34

d)-35-36

bài 2 : Bỏ ngoặc rồi tính bằng cách hợp lí:

a)24-(-57+65)+(43-124)-(-65)

b)-237-(319-50)-(-37)+(150-681)

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Answer 1

Bài 1:

a: 37+(-35)=37-35=2

b: 20-(-21)=20+21=41

c: -57+34=-(57-34)=-23

d: -35-36=-(35+36)=-71

Bài 2:

a: \(24-\left(-57+65\right)+\left(43-124\right)-\left(-65\right)\)

\(=24+57-65+43-124+65\)

\(=24-124+57+43\)

=-100+100

=0

b: \(-237-\left(319-50\right)-\left(-37\right)+\left(150-681\right)\)

\(=-237-319+50+37+150-681\)

\(=\left(-237+37\right)+\left(-319-681\right)+\left(50+150\right)\)

=-200-1000+200

=-1000