Question

7．直接寫出得數(shù)．

2.4×3=	0.36÷0.4=	1.05÷0.5=	0.84×0.2×5=
1.6×0.25=	1.2×0.04=	0.32÷8=	0.39÷5÷0.6=

Answer 1

分析 根據(jù)小數(shù)加減乘除法運算的計算法則計算即可求解．注意0.84×0.2×5根據(jù)乘法結(jié)合律計算，1.6×0.25變形為0.4×（4×0.25）計算，0.39÷5÷0.6關(guān)鍵除法的性質(zhì)計算．

解答 解：

2.4×3=7.2	0.36÷0.4=0.9	1.05÷0.5=2.1	0.84×0.2×5=0.84
1.6×0.25=0.4	1.2×0.04=0.048	0.32÷8=0.04	0.39÷5÷0.6=0.13

點評 考查了小數(shù)加減乘除法運算，關(guān)鍵是熟練掌握計算法則正確進行計算．