Question

1．直接寫出的數(shù)

$\frac{1}{5}$-$\frac{1}{6}$=	$\frac{2}{3}$+$\frac{3}{2}$=	$\frac{3}{4}$×$\frac{8}{5}$×$\frac{5}{6}$=	29×38≈
9.1-1.9=	7.2÷0.6=	17.45+8.55=	0.33=
71÷8≈	44÷$\frac{11}{10}$=	$\frac{7}{8}$×$\frac{1}{7}$=	$\frac{4}{5}$÷80%=

Answer 1

分析 根據(jù)分?jǐn)?shù)、小數(shù)和百分?jǐn)?shù)四則運算的計算法則及估算方法進行計算即可，0.3³=0.3×0.3×0.3．

解答 解：

$\frac{1}{5}$-$\frac{1}{6}$=$\frac{1}{30}$	$\frac{2}{3}$+$\frac{3}{2}$=$\frac{13}{6}$	$\frac{3}{4}$×$\frac{8}{5}$×$\frac{5}{6}$=1	29×38≈1200
9.1-1.9=7.2	7.2÷0.6=12	17.45+8.55=26	0.33=0.027
71÷8≈9	44÷$\frac{11}{10}$=40	$\frac{7}{8}$×$\frac{1}{7}$=$\frac{1}{8}$	$\frac{4}{5}$÷80%=1

點評 此題考查了分?jǐn)?shù)、小數(shù)和百分?jǐn)?shù)四則運算的計算法則及估算方法的運用．