a)\(37.x6.5-7.5x3.4-6.6x7.5+3.5x37.5\)

=\(7.5x5x6.5-7.5x3.4-6.6x7.5+3.5x7.5x5\)

=\(7.5x\left(5x6.5-3.4-6.6+3.5x5\right)\)

=\(7.5x\left(2x6.5-10\right)\)

=\(7.5x\left(13-10\right)\)

=\(7.5x3\)

=\(22.5\)

nhầm :))

coming

Câu 1: 220

Câu 2: 0,8

172

he is too pro

:)))))

5-0x3+9:3

=5-0+3

=8

ghi đáp án ???