问题 解答题 竖式计算 1.688×32(得数保留两位小数)29.9÷0.462.6×0.250.77×0.35(得数保留三位小数)72.4×1.8. 答案 1.688×32≈54.02,29.9÷0.46=65,2.6×0.25=0.65,0.77×0.35≈0.270,72.4×1.8=130.32,.