问题 解答题 竖式计算:75×1938.5-18.9872÷86.7+3.889×46980÷7(验算)544÷6(验算) 答案 75×19=142538.5-18.9=19.6872÷8=1096.7+3.8=10.589×46=4094980÷7=140验算:544÷6=90…4验算: