Question

计算，能简算的要简算． （9.15-0.45×3.6）÷0.3	17.6-0.5×0.5-0.75
5.639-1.732-2.268	7.86×1.7-0.7×7.86．

Answer 1

①（9.15-0.45×3.6）÷0.3
=（9.15-1.62）÷0.3
=7.53÷0.3
=25.1

②17.6-0.5×0.5-0.75
=17.6-0.25-0.75
=17.6-（0.25+0.75）
=17.6-1
=16.6

③5.639-1.732-2.268 　
=5.639-（1.732+2.268）
=5.639-4
=1.639

④7.86×1.7-0.7×7.86
=7.86×（1.7-0.7）
=7.86×1
=7.86