Question

bai1:tim x biet a,(x:23+45)•67

bai2:tinh nhanh a,(44•52•60):(11•13•15) b,123•456-456•123123

Answer 1

\(\left(x:23+45\right).67=8911\)

\(x:23+45=8911:67\)

\(x:23+45=133\)

\(x :23=133-45\)

\(x:23=88\)

\(x=88.23\)

\(x=2024\)

Answer 2

thiếu đề b1
 

Answer 3

Bài 2: 

a, \(\frac{44.52.60}{11.13.15}=\frac{4.11.4.13.4.15}{11.13.15}=4.4.4=64\)

b, \(123.456-456.123123=456\left(123-123123\right)=456.\left(-123000\right)=-56088000\)

Answer 4

\(bài1:\)

\(\left(x:23+45\right).67=8911\)

\(\left(x:23+45\right)=8911:67\)

\(x:23+45=133\)

\(x:23=133+45\)

\(x:23=178\)

\(x=178.23\)

\(x=4094\)