365减去185的差,除以12乘以5的积,商是多少?
= = == = == = =
看“分数墙”列式计算
口算= +8+= ﹣+=+= 3﹣﹣= 3﹣+=+= 1﹣﹣= 1++=
脱式计算,能简算要简算﹣(+)+++﹣(﹣)﹣+﹣+﹣+(+)