Question

TINH NHANH

77²+23+77.46

Answer 1

\(77^2+23+77.46\)

\(=77.77+23+77.46\)

\(=77.\left(77+46\right)+23\)

\(=77.123+23\)

\(=9471+23=9494\)

Answer 2

\(77^2+23+77.46\)

\(=77.77+23+77.46\)

\(=77.\left(77+46\right)+23\)

\(=77.123+23\)

\(=9471+23\)

\(=9494\)

Answer 3

\(vt=77^2+23+77.23+77.23.\)

\(77\left(77+23\right)+23\left(77+1\right)\)

\(0+23.78=23.100-23.22\)

\(=2300-23.10-23.10-23.2=2300-230-230-46\)

\(2300-460-46=2300-300-60-46=2000-106\)

\(=1900-6=1984\)

Answer 4

77²+23+77.46

= 77²+23+77.23+77.23

= 77.(77+23)+23.(77+1)

= 77.100+23.78

= 7700+1794=9494

Answer 5

Ta có:\(77^2+23+77.46\)

\(=77.77+23+77.46\)

\(=\left(77.46+77.77\right)+23\)

\(=77.\left(46+77\right)+23\)

\(=77.123+23\)

\(=9471+23=9494\)