题目内容
用递等式计算.
20.4÷3.4-0.36
90÷(12.4+5.6)
4.16÷[(9.25-8.6)×0.8].
20.4÷3.4-0.36
90÷(12.4+5.6)
4.16÷[(9.25-8.6)×0.8].
(1)20.4÷3.4-0.36
=6-0.36,
=5.64;
(2)90÷(12.4+5.6)
=90÷18,
=5;
(3)4.16÷[(9.25-8.6)×0.8]
=4.16÷[0.65×0.8],
=4.16÷0.52,
=8.
=6-0.36,
=5.64;
(2)90÷(12.4+5.6)
=90÷18,
=5;
(3)4.16÷[(9.25-8.6)×0.8]
=4.16÷[0.65×0.8],
=4.16÷0.52,
=8.
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