Bài 1
a) \(=160-50=110\)
b) \(=100-2=98\)
c) \(5871:103=57\)
d) \(=111+1=112\)
Bài 2
a) \(=36:4.3+2.25=9.3+50=27+50=77\)
b) \(=5.16-18:9=80-2=78\)
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Bài 3
a) \(=80-\left(4.25-3.8\right)=80-\left(100-24\right)=4\)
b) \(=23.\left(75+25\right)+180=23.100+180=2480\)
c) \(=16.5\left(131-9^2\right)=80-\left(131-81\right)=30\)
d) \(=100:\left[250:\left(450-400\right)\right]=100:\left(250:50\right)=20\)
Bài 1
a) =160−50=110=160−50=110
b) =100−2=98=100−2=98
c) 5871:103=575871:103=57
d) =111+1=112=111+1=112
Bài 2
a) =36:4.3+2.25=9.3+50=27+50=77=36:4.3+2.25=9.3+50=27+50=77
b) =5.16−18:9=80−2=78=5.16−18:9=80−2=78
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Bài 3
a) =80−(4.25−3.8)=80−(100−24)=4=80−(4.25−3.8)=80−(100−24)=4
b) =23.(75+25)+180=23.100+180=2480=23.(75+25)+180=23.100+180=2480
c) =16.5(131−92)=80−(131−81)=30=16.5(131−92)=80−(131−81)=30
d) =100:[250:(450−400)]=100:(250:50)=20
