Question

23.87+77.16+77.24-23.37

Answer 1

\(23\cdot87+77\cdot16+77\cdot24-23\cdot37\)

\(=\left(23\cdot87-23\cdot37\right)+77\cdot16+77\cdot24\)

\(=23\left(87-37\right)+77\left(16+24\right)\)

\(=23\cdot50+77\cdot40\)

\(=1150+3080=4230\)

Answer 2

23.87+77.16+77.24-23.37

=23.(87-37)+77.(16+24)

=23.50+77.40

=1120+3080

=4230