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四年级下册数学一课一练-3.5蚕丝一、单选题1.天天超市一种苹果的价格是每千克7.98元,妈妈买了2.7千克,应付(   )元。A. 21.546                                       B. 21.55                                       C. 21.62.将8.65×0.3的积保留两位小数,正确结果是(  )。A. 2.59                                          B. 2.6                                          C. 2.603.0.35×0.2的积化简后是(  )A. 一位小数                                  B. 两位小数                                  C. 三位小数4.下面的算式中,积不相同的一个算式是(   )。A. 7.4×0.64                           B. 0.74×64                           C. 0.74×6.4                           D. 0.074×645.1.24×0.24的积保留两位小数是(  )A. 0.29                                      B. 0.30                                      C. 0.3                                      D. 0.03二、判断题6.超市的苹果每千克4.6元,王丽的妈妈买了3.02千克,王丽的妈妈花了多少元?4.6×3.02=13.892(元).答:王丽的妈妈花了13.892元.7.一个数的12.08倍一定比原数大。8.两个小数相乘的积一定小于1。9.0.05乘一个数,所得的积一定比这个数小.10.列竖式计算小数乘法时,应把因数中的小数点对齐。三、填空题11.一只鸵鸟的身高是2.75米,一只长颈鹿的身高是鸵鸟的2.2倍,这只长颈鹿的身高是________米。12.在横线上填“<”、“>”或“=”.1÷0.7________1        2.5________2.     9.53×6________95.3×0.6    8.3________8.3333…7.23________7.19      0.1×0.99________0.1    6.5________6.50          7.61________7.62÷0.25________2×4    7.2÷1.2________2        0÷2019________2019×013.填表╳7891.21.31.41.51.6 0.1________________________________________________________________0.2________________________________________________________________0.3________________________________________________________________0.4________________________________________________________________0.5________________________________________________________________14.在横线上填上>、 查看更多

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