Question

1．

直接寫出得數(shù) 3.8-3.08=	0÷2.315=	6.3÷3=
4.5÷5=	5.6÷14=	0.6×0.8=
3.6×0.4=	10-0.1=	12.5×8=
50×0.04=	80×0.3=	1.1×9=
0.8+21.02=	1÷0.25=	7÷0.25=
3×0.9=	0.054÷0.06=	0.45÷10=
6.4÷16=	2.5×0.4=	7.8÷3.9=
0.75÷15=	1.5÷5=	6.5÷1.3=
2.38÷0.01=	0.256×100=	12.53+4.47=
5-0.41=	2.5×0.4=	0.125×8=
4.8÷6=	54÷0.9=	2.05×4=
2.5×1.2=	3.2÷0.4=	0.1÷0.01=
0.1×0.1=	3.2×2.5=	9.1÷13=
10.5÷1.5=	0.875×0=	4.8×0.25=
1.21÷11=	12.12÷12=

Answer 1

分析 根據(jù)小數(shù)加減乘除的運(yùn)算方法口算即可，注意小數(shù)點(diǎn)的位置．

解答 解：

3.8-3.08=0.72	0÷2.315=0	6.3÷3=2.1
4.5÷5=0.9	5.6÷14=0.4	0.6×0.8=0.48
3.6×0.4=1.44	10-0.1=9.9	12.5×8=100
50×0.04=2	80×0.3=24	1.1×9=9.9
0.8+21.02=21.82	1÷0.25=4	7÷0.25=28
3×0.9=2.7	0.054÷0.06=0.9	0.45÷10=0.045
6.4÷16=0.4	2.5×0.4=1	7.8÷3.9=2
0.75÷15=0.05	1.5÷5=0.3	6.5÷1.3=5
2.38÷0.01=238	0.256×100=25.6	12.53+4.47=17
5-0.41=4.59	2.5×0.4=1	0.125×8=1
4.8÷6=0.8	54÷0.9=60	2.05×4=8.2
2.5×1.2=3	3.2÷0.4=8	0.1÷0.01=10
0.1×0.1=0.01	3.2×2.5=8	9.1÷13=0.7
10.5÷1.5=7	0.875×0=0	4.8×0.25=1.2
1.21÷11=0.11	12.12÷12=1.01

點(diǎn)評(píng) 此題主要考查了根據(jù)小數(shù)加減乘除的運(yùn)算方法口算的能力，要熟練掌握．