(-1.5)*3+2*3+1.7*4+(-2.3)*2

更新时间2021-09-30 13:29:54

(-1.5)*3+2*3+1.7*4+(-2.3)*2

=-4.5+6+6.8+4.6

=12.8+0.1

=12.9

(-1.5)×3+2×3+1.7×4+(-2.3)×2

=-4.5+6+6.8-4.6

=1.5+(6.8-4.6)

=1.5+2.2

=3.7

(-1.5)*3+2*3+1.7*4+(-2.3)*2

=-4.5+6+6.8-4.6

=6+6.8-4.5-4.6

=6+6.8-（4.5+4.6）

=12.8-9.1

=3.7

(-1.5)*3+2*3+1.7*4+(-2.3)*2

=-4.5+6+6.8-4.6

=12.8-9.1

=3.7

(-1.5)*3+2*3+1.7*4+(-2.3)*2

=-4.5+6+6.8-4.6

=3.7