Question

看誰(shuí)算得又對(duì)又快．

17.56÷8.32≈	19.42÷5.22≈	18.59÷5.93≈	9.49÷3.69≈	13.49÷7.12≈
17.71÷2.52≈	9.31÷5.84≈	5.93÷5.77≈	4.68÷3.92≈	16.69÷4.78≈
15.29÷5.81≈	5.36÷1.17≈	12.87÷2.09≈	11.75÷8.33≈	17.94÷14.67≈
19.11÷4.46≈	14.99÷9.23≈	13.98÷10.77≈	17.27÷6.58≈	15.58÷9.1≈

Answer 1

考點(diǎn)：數(shù)的估算

專(zhuān)題：運(yùn)算順序及法則

分析：根據(jù)小數(shù)除法的計(jì)算法則，求出各題的商，然后取近似值即可．

解答：

解： 17.56÷8.32≈2.11	19.42÷5.22≈3.72	18.59÷5.93≈3.13	9.49÷3.69≈2.57	13.49÷7.12≈1.89
17.71÷2.52≈7.03	9.31÷5.84≈1.59	5.93÷5.77≈1.03	4.68÷3.92≈1.19	16.69÷4.78≈3.49
15.29÷5.81≈2.63	5.36÷1.17≈4.58	12.87÷2.09≈6.16	11.75÷8.33≈1.41	17.94÷14.67≈1.22
19.11÷4.46≈4.28	14.99÷9.23≈1.62	13.98÷10.77≈1.3	17.27÷6.58≈2.62	15.58÷9.1≈1.71

點(diǎn)評(píng)：此題考查了小數(shù)的除法，明確小數(shù)除法的計(jì)算法則和取近似值的方法，是解答此題的關(guān)鍵．