Question

計(jì)算下面各題

31.5×24.5	0.8×0.56	4.23×0.028
0.63×1.05	36×0.56	0.32×0.2
以下三題得數(shù)保留兩位小數(shù) 35.6×0.506	6.728×3.2	34.3×0.23．

Answer 1

考點(diǎn)：小數(shù)乘法

專題：計(jì)算題

分析：根據(jù)小數(shù)乘法的計(jì)算法則進(jìn)行計(jì)算即可求解．注意后面三題得數(shù)保留兩位小數(shù)．

解答： 解：31.5×24.5=771.75

0.8×0.56=0.448

4.23×0.028=0.11844

0.63×1.05=0.6615

36×0.56=0.2016

0.32×0.2=0.064

以下三題得數(shù)保留兩位小數(shù)
35.6×0.506≈18.01

6.728×3.2≈21.53

34.3×0.23≈0.79

點(diǎn)評(píng)：考查了小數(shù)乘法，關(guān)鍵是熟練掌握計(jì)算法則正確進(jìn)行計(jì)算．