题目内容
（1）4.5÷0.5-2.7÷0.3
（2）24.42-（60.4-28.6）÷6．
（2）24.42-（60.4-28.6）÷6．
分析：（1）先算除法，再算减法；
（2）先算小括号里面的减法，再算除法，最后算括号外面的减法．
（2）先算小括号里面的减法，再算除法，最后算括号外面的减法．
解答：解：（1）4.5÷0.5-2.7÷0.3
=9-9
=0；
（2）24.42-（60.4-28.6）÷6
=24.42-31.8÷6
=24.42-5.3
=19.12．
=9-9
=0；
（2）24.42-（60.4-28.6）÷6
=24.42-31.8÷6
=24.42-5.3
=19.12．
点评：考查了小数四则混合运算，弄清运算顺序，然后再进一步计算．
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