Question

Tính hợp lý : 24(15-4)+4(24-15)

Answer 1

nó sẽ bằng

=24x15-24x4+24x4-24x15

=(24x15-24x15)+(24x4-24x4)

=0

Answer 2

Ta có:\(24.\left(15-4\right)+4.\left(24-15\right)\)

\(=24.15-24.4+4.24-15.4\)\(=24.15-15.4\)

\(=15.\left(24-4\right)\)

\(=15.20=300\)

Answer 3

\(24\left(15-4\right)+4\left(24-15\right)\)

\(=24.15-24.4+4.24-4.15\)

\(=\left(24.15-4.15\right)+\left(4.24-24.4\right)\)

\(=15\left(24-4\right)+0\)

\(=15.20\)

\(=300\)

Answer 4

300