2.5+2.5÷0.5-0.5×3 (1.5+1.5×3)÷0.6+0.4 10.6-(8.4×0.6-0.54)÷0.
2个回答

2.5+2.5÷0.5-0.5×3

=2.5+5-1.5

=7.5-1.5

=6

(1.5+1.5×3)÷0.6+0.4

=6÷0.6+0.4

=10+0.4

=10.4

10.6-(8.4×0.6-0.54)÷0.9

=10.6-(5.04-0.54)÷0.9

=10.6-4.5÷0.9

=10.4-5

=5.4

24-【22.7-(9.82-2.02)】

=24-【22.7-7.8】

=24-14.9

=9.1

【(17-4.5)×0.2+7.5】×0.31

=【12.5×0.2+7.5】×0.31

=【2.5+7.5】×0.31

=10×0.31

=3.1