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    精英家教网 > 小学数学 > 题目详情
    0×7= 2.6+0.4= 15÷0.01= 21.2-21=
    18a+2a= 0.72÷0.8= 0.4×0.4= 0.12÷0.04=
    0.8×100= 2.5×4×0=
    分析：0×7，2.5×4×0根据任何数乘0都得0求解；15÷0.01把15的小数点向右移动2位即可；18a+2a先算18与2的和，然后再乘a；0.8×100把0.8的小数点向右移动2位即可；其它题目根据运算法则直接求解．
    解答：
    解：0×7=0， 2.6+0.4=3， 15÷0.01=1500， 21.2-21=0.2，
    18a+2a=20a， 0.72÷0.8=0.9， 0.4×0.4=0.16， 0.12÷0.04=3，
    0.8×100=80， 2.5×4×0=0．
    点评：本题考查了基本的计算，计算时要细心，注意小数点的位置．
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