Question

6．直接寫得數(shù)．

1.2×2=	0.5×0.3=	1.2×0.5=	2.4÷3=
8.4÷7=	2.5÷0.5=	3-1.2=	3÷0.1=
1.5÷0.5=	0.25+0.75=	1.5×4=	1.2+4=
0.8×0.4=	3.27×100=	0.25×0.8=	1.6×0.5=
1.2×0.12×8=	4.5×0.9+5.5×0.9=	10-1.8-2.2=	4.8×0.2×0.5=
0.25+3.1+1.75=	0.3÷0.15÷2=

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4.5×0.9+5.5×0.9根據(jù)乘法分配律計算，10-1.8-2.2根據(jù)減法的性質(zhì)計算，4.8×0.2×0.5根據(jù)乘法結(jié)合律計算，0.25+3.1+1.75根據(jù)加法結(jié)合律計算．

解答 解：

1.2×2=2.4	0.5×0.3=0.15	1.2×0.5=0.6	2.4÷3=0.8
8.4÷7=1.2	2.5÷0.5=5	3-1.2=1.8	3÷0.1=30
1.5÷0.5=3	0.25+0.75=1	1.5×4=6	1.2+4=5.2
0.8×0.4=0.32	3.27×100=327	0.25×0.8=0.2	1.6×0.5=0.8
1.2×0.12×8=1.152	4.5×0.9+5.5×0.9=9	10-1.8-2.2=6	4.8×0.2×0.5=0.48
0.25+3.1+1.75=5.1	0.3÷0.15÷2=1

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．