Question

11．直接寫出得數(shù)

14×$\frac{4}{7}$=	$\frac{1}{4}$+$\frac{3}{8}$=	62.98÷7.1≈	3-$\frac{1}{3}$=	$\frac{4}{5}$-（$\frac{4}{5}$-$\frac{1}{2}$）=
9÷$\frac{1}{5}$=	10÷10%=	$\frac{1}{5}$-$\frac{1}{7}$=	0.33=	$\frac{1}{5}$×7÷$\frac{1}{5}$×7=

Answer 1

分析 根據(jù)分數(shù)、小數(shù)四則運算的計算法則及混合運算的運算順序進行計算即可，$\frac{4}{5}$-（$\frac{4}{5}$-$\frac{1}{2}$）運用減法的性質簡算，$\frac{1}{5}$×7÷$\frac{1}{5}$×7運用乘法交換律簡算．

解答 解：

14×$\frac{4}{7}$=8	$\frac{1}{4}$+$\frac{3}{8}$=$\frac{5}{8}$	62.98÷7.1≈8.87	3-$\frac{1}{3}$=2$\frac{2}{3}$	$\frac{4}{5}$-（$\frac{4}{5}$-$\frac{1}{2}$）=$\frac{1}{2}$
9÷$\frac{1}{5}$=45	10÷10%=100	$\frac{1}{5}$-$\frac{1}{7}$=$\frac{2}{35}$	0.33=0.027	$\frac{1}{5}$×7÷$\frac{1}{5}$×7=49

點評 此題考查了四則運算計算法則的運用及簡算的能力．