Question

Tính hợp lý:

34.(66-5)-66.(34+5)

Answer 1

=34x66-34x5 -66x34-66x5

=-34x5-66x5

=5x(-34-66)=5x(-100)=-500

Answer 2

34.(66-5)-66.(34+5)=(34-34).(66-66).(5+5)=0.0.10=0

Answer 3

       \(34.\left(66-5\right)-66.\left(34+5\right)\)

\(=34.66-34.5-66.34-66.5\)

\(=\left(34.66-66.34\right)-\left(34.5+66.5\right)\)

\(=0-\left(34+66\right).5\)

\(=0-100.5\)

\(=0-500\)

\(=-500\)