题目内容
【题目】(遂昌县)用递等式计算.
①[1﹣(+)]×36
②(+)×36
③7.5×4.7+4.7×2.5
④25.3×12﹣33.46÷0.35
⑤×[÷(1﹣)]
⑥+(﹣)÷.
【答案】①;②29;③47;④208;⑤4;⑥
【解析】
试题分析:①④⑤⑥根据四则混合运算的运算顺序计算即可.
②③可据乘法分配律进行计算;
解答:解:①[1﹣(+)]×36,
=[1﹣(+)]×36,
=[1﹣]×36,
=×36,
=;
②(+)×36,
=36×,
=8+21,
=29;
③7.5×4.7+4.7×2.5,
=4.7×(7.5+2.5),
=4.7×10,
=47;
④25.3×12﹣33.46÷0.35,
=303.6﹣95.6,
=208;
⑤×[÷(1﹣)],
=×[÷],
=[],
=×5,
=4;
⑥+(﹣)÷,
=+(﹣)×2,
=+×2,
=+,
=.
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