\(77^2+23+77.46\)
\(=77.77+23+77.46\)
\(=77.\left(77+46\right)+23\)
\(=77.123+23\)
\(=9471+23=9494\)
\(77^2+23+77.46\)
\(=77.77+23+77.46\)
\(=77.\left(77+46\right)+23\)
\(=77.123+23\)
\(=9471+23\)
\(=9494\)
\(vt=77^2+23+77.23+77.23.\)
\(77\left(77+23\right)+23\left(77+1\right)\)
\(0+23.78=23.100-23.22\)
\(=2300-23.10-23.10-23.2=2300-230-230-46\)
\(2300-460-46=2300-300-60-46=2000-106\)
\(=1900-6=1984\)
772+23+77.46
= 772+23+77.23+77.23
= 77.(77+23)+23.(77+1)
= 77.100+23.78
= 7700+1794=9494
Ta có:\(77^2+23+77.46\)
\(=77.77+23+77.46\)
\(=\left(77.46+77.77\right)+23\)
\(=77.\left(46+77\right)+23\)
\(=77.123+23\)
\(=9471+23=9494\)
cau 23 chi cach tinh nha
