问题 解答题 (1)16.5×4.2=(2)0.738÷3.6=(3)5.63÷6.1≈(4)1.36×0.17≈ 答案 (1)16.5×4.2=69.3(2)0.738÷3.6=0.205(3)5.63÷6.1≈0.92(4)1.36×0.17≈0.23