Question

9．直接寫出得數(shù)．

2.89-0.98=	4.5×4×0.25=	1-3÷8=	58×1%=
7.65+2.35=	$\frac{3}{5}$×2.5=	9-$\frac{5}{8}$-0.375=	3-$\frac{5}{6}$=
52-42=	$\frac{1}{4}$：125%=	$\frac{1}{3}$×$\frac{1}{4}$÷$\frac{1}{3}$×$\frac{1}{4}$=	1÷1%-1=
6÷$\frac{3}{4}$=

Answer 1

分析 根據(jù)四則運(yùn)算的計(jì)算法則計(jì)算即可求解．注意9-$\frac{5}{8}$-0.375根據(jù)減法的性質(zhì)計(jì)算，$\frac{1}{3}$×$\frac{1}{4}$÷$\frac{1}{3}$×$\frac{1}{4}$變形為（$\frac{1}{3}$÷$\frac{1}{3}$）×（$\frac{1}{4}$×$\frac{1}{4}$）計(jì)算．

解答 解：

2.89-0.98=1.91	4.5×4×0.25=4.5	1-3÷8=$\frac{5}{8}$	58×1%=0.58
7.65+2.35=10	$\frac{3}{5}$×2.5=1.5	9-$\frac{5}{8}$-0.375=8	3-$\frac{5}{6}$=2$\frac{1}{6}$
52-42=9	$\frac{1}{4}$：125%=$\frac{1}{5}$	$\frac{1}{3}$×$\frac{1}{4}$÷$\frac{1}{3}$×$\frac{1}{4}$=$\frac{1}{16}$	1÷1%-1=99
6÷$\frac{3}{4}$=8

點(diǎn)評 考查了四則運(yùn)算，關(guān)鍵是熟練掌握計(jì)算法則正確進(jìn)行計(jì)算．