3.59×10= 2.14+10= 0.0124×1000= 1.64×0=
42.3÷1000= 2.75÷10= 102÷100= 18.067÷10=
6.4÷4= 3.28+0.82= 10-7.15= 3.5×4=
分析:根據(jù)小數(shù)加減乘除的計(jì)算方法進(jìn)行計(jì)算.
解答:解:
3.59×10=35.9, 2.14+10=12.14, 0.0124×1000=12.4, 1.64×0=0,
42.3÷1000=0.0423, 2.75÷10=0.275, 102÷100=1.02, 18.067÷10=1.8067,
6.4÷4=1.6, 3.28+0.82=4.1, 10-7.15=2.85, 3.5×4=14.
點(diǎn)評(píng):口算時(shí),注意運(yùn)算符號(hào)和數(shù)據(jù),然后再進(jìn)一步計(jì)算.
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