Question

[Trần văn tuân]

Tính nhanh Abằng 111nhân 112 cộng 111nhân 112 trên 222nhân 224 cộng 222 nhân 224 cộng 222 nhân 224

Answer 1

[Nguyễn Thanh Hiền]

\(A=\frac{111.112+111.112}{222.224+222.224+222.224}\)

\(A=\frac{111.112+111.112}{111.112.4+111.112.4+111.112.4}\)

\(A=\frac{111.112.\left(1+1\right)}{111.112.\left(4+4+4\right)}\)

\(A=\frac{111.112.2}{111.112.12}\)

\(A=\frac{2}{12}\)

\(A=\frac{1}{6}\)

_Chúc bạn học tốt_

Answer 2

[_Never Give Up_ĐXRBBNBMCSNVCNĐTĐ_]

\(A=\frac{111\times112+111\times112}{222\times224+222\times224+222\times224}\)

\(A=\frac{111\times112\times2}{111\times112\times4+111\times112\times4+111\times112\times4}\)

\(A=\frac{111\times112\times2}{111\times112\times4\times3}\)

\(A=\frac{1}{6}\)