题目内容
脱式计算.
4.98+8.64÷2.4
2.9x0.72+0.18
70.42-36÷7.5.
4.98+8.64÷2.4
2.9x0.72+0.18
70.42-36÷7.5.
分析:(1)先算除法,再算加法;
(2)先算乘法,再算加法;
(3)先算除法,再算减法.
(2)先算乘法,再算加法;
(3)先算除法,再算减法.
解答:解:
(1)4.98+8.64÷2.4,
=4.98+3.6,
=8.58;
(2)2.9×0.72+0.18,
=2.088+0.18,
=2.268;
(3)70.42-36÷7.5,
=70.42-4.8,
=65.62.
(1)4.98+8.64÷2.4,
=4.98+3.6,
=8.58;
(2)2.9×0.72+0.18,
=2.088+0.18,
=2.268;
(3)70.42-36÷7.5,
=70.42-4.8,
=65.62.
点评:此题主要考查小数的四则混合运算的运算顺序,然后根据运算顺序进行计算.
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