Question

19．直接寫(xiě)出得數(shù)．

502-197=	8.01-2.1=	2.5×40=
0.33=	5.2÷0.125÷8=	8.1÷0.03=
$\frac{3}{5}$+3=	$\frac{5}{16}$×$\frac{8}{15}$=	$\frac{8}{9}$×$\frac{9}{24}$=
134-18=	1.5×4=	7.45+8.55=

Answer 1

分析 根據(jù)整數(shù)小數(shù)分?jǐn)?shù)加減乘除法的計(jì)算方法解答，5.2÷0.125÷8利用除法性質(zhì)進(jìn)行簡(jiǎn)算，多步計(jì)算的注意運(yùn)算順序．

解答 解：

502-197=305	8.01-2.1=5.91	2.5×40=100
0.33=0.027	5.2÷0.125÷8=5.2	8.1÷0.03=270
$\frac{3}{5}$+3=3.6	$\frac{5}{16}$×$\frac{8}{15}$=$\frac{1}{6}$	$\frac{8}{9}$×$\frac{9}{24}$=$\frac{1}{3}$
134-18=116	1.5×4=6	7.45+8.55=16

點(diǎn)評(píng) 直接寫(xiě)得數(shù)時(shí)，注意數(shù)據(jù)特點(diǎn)和運(yùn)算符號(hào)，能運(yùn)用運(yùn)算定律和性質(zhì)進(jìn)行簡(jiǎn)算的要簡(jiǎn)算，多步計(jì)算的要注意運(yùn)算順序．