Question

10．直接寫得數(shù)．

2.4×5=	$\frac{4}{5}$÷4=	$\frac{5}{6}$×$\frac{3}{5}$×$\frac{2}{3}$=
$\frac{3}{4}$×$\frac{1}{2}$=	$\frac{1}{2}$+$\frac{1}{3}$=	0.78×99+0.78=
0.08+0.2=	1.1-0.01=	52×4÷52×4=

Answer 1

分析 根據(jù)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0.78×99+0.78根據(jù)乘法分配律計(jì)算，52×4÷52×4變形為（52÷52）×（4×4）計(jì)算．

解答 解：

2.4×5=12	$\frac{4}{5}$÷4=$\frac{1}{5}$	$\frac{5}{6}$×$\frac{3}{5}$×$\frac{2}{3}$=$\frac{1}{3}$
$\frac{3}{4}$×$\frac{1}{2}$=$\frac{3}{8}$	$\frac{1}{2}$+$\frac{1}{3}$=$\frac{5}{6}$	0.78×99+0.78=78
0.08+0.2=0.28	1.1-0.01=1.09	52×4÷52×4=16

點(diǎn)評(píng) 考查了小數(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．