Question

5．直接寫得數(shù)

1÷$\frac{2}{5}$=	0.87÷0.01=	40×60%=	233+198=	1.56÷2.5÷4=
$\frac{5}{8}$×$\frac{4}{15}$=	2-$\frac{5}{7}$=	202=	7070÷35=	$\frac{1}{8}$×8÷$\frac{1}{8}$×8=

Answer 1

分析 根據(jù)整數(shù)、小數(shù)和分?jǐn)?shù)加減乘除法運(yùn)算的計(jì)算法則計(jì)算即可求解．注意1.56÷2.5÷4根據(jù)除法的性質(zhì)計(jì)算，$\frac{1}{8}$×8÷$\frac{1}{8}$×8變形為（$\frac{1}{8}$÷$\frac{1}{8}$）×（8×8）計(jì)算．

解答 解：

1÷$\frac{2}{5}$=$\frac{5}{2}$	0.87÷0.01=87	40×60%=24	233+198=431	1.56÷2.5÷4=0.156
$\frac{5}{8}$×$\frac{4}{15}$=$\frac{1}{6}$	2-$\frac{5}{7}$=1$\frac{2}{7}$	202=400	7070÷35=202	$\frac{1}{8}$×8÷$\frac{1}{8}$×8=64

點(diǎn)評(píng) 考查了整數(shù)、小數(shù)和分?jǐn)?shù)加減乘除法運(yùn)算，關(guān)鍵是熟練掌握計(jì)算法則正確進(jìn)行計(jì)算．