递等式计算:
360-225÷15×18÷×4.72-1.16-2.84+÷+.
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解:(1)360-225÷15×18,
=360-15×18,
=360-270,
=90;
(2)÷×,
=×,
=;
(3)4.72-1.16-2.84,
=4.72-(1.16+2.84),
=4.72-4,
=0.72;
(4)+÷+,
=++,
=++,
=1+,
=1.
解析分析:(1)先算除法,再算乘法,最后算减法;
(2)按照从左到右的顺序计算;
(3)根据减法的性质简算;
(4)先算除法,再根据加法交换律简算.
点评:此题主要考查分数、整数、小数的四则混合运算的运算顺序和应用运算定律进行简便计算.