括号12乘乘以105-35括号除以25的巧算怎么算?

如题所述

第1个回答  2020-12-11
(12*105-35)÷25
=(1260-35)÷25
=1225÷25
=49
第2个回答  2020-12-11
12X(105-35)X35
=12X70X35
=12X70X35
=12X2X35X35
=24X5X7X5X7
=24X5×5X7X7
=120X5X7X7
=600X49
=29400