Question

16．直接寫(xiě)出得數(shù)．

0.57+0.43=	4.13-1.3=	2.5×28=	7.2÷0.6=
3-1$\frac{5}{6}$=	$\frac{1}{3}$+$\frac{1}{6}$=	15÷$\frac{1}{15}$×$\frac{1}{15}$=	$\frac{5}{4}$×8+8×$\frac{1}{4}$=

Answer 1

分析 根據(jù)小數(shù)、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2.5×28變形為2.5×4×7計(jì)算，15÷$\frac{1}{15}$×$\frac{1}{15}$變形為15×（$\frac{1}{15}$÷$\frac{1}{15}$）計(jì)算，$\frac{5}{4}$×8+8×$\frac{1}{4}$根據(jù)乘法分配律計(jì)算．

解答 解：

0.57+0.43=1	4.13-1.3=2.83	2.5×28=70	7.2÷0.6=12
3-1$\frac{5}{6}$=1$\frac{1}{6}$	$\frac{1}{3}$+$\frac{1}{6}$=$\frac{1}{2}$	15÷$\frac{1}{15}$×$\frac{1}{15}$=15	$\frac{5}{4}$×8+8×$\frac{1}{4}$=12

點(diǎn)評(píng) 考查了小數(shù)、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．