Question

4.7+2.3=	4.5×2=	6.9-2.5=	7.2×0.8=
6×3.4=	0.62-0.32=	1.4×0.5=	0.75×100=
0.02×0.5=	3.6÷0.3=	6.3÷7=	5.6÷100=
0.75÷0.25=	0.125×8=	4.8÷0.3=	0.96÷2=
0.56÷28=	0.36÷0.4=	0.64÷0.8=	0.72÷3.6=
3.6÷24=	0.8×1.1=	7.2+12.8=	46.7-3.8=
12.8÷4=	5.2÷13=	12.5÷5=	1.64÷41=
10÷20=	24÷15=	8.65×10=	0.35×0.6=
3.08×0.01=	4.95×1000=	6.9×0.1=	0.4×0.5=
2.4÷0.8=	10.8÷9=	9.6÷0.8=	0.108÷2=
4.95÷0.9=	9.65÷0.1=	0.325×100=	2.5×8=
0.56÷0.7=	0.125×4=	3.28×0.1=	3.9÷0.13=
7.2×0.1=	0.01×0.1=	0.25×0.4=	1.6÷0.8=
1÷2.5=	1.25×0.8=	3.2÷0.04=	0÷1.7=
0.22×102=	9.6÷0.8=	5×0.24=	4.5-0.05=
3.9÷0.13	16.5÷0.5=	5×0.12=	24×0.5=
4.8×0.5=	2.8+4.2=	0.84÷2.1=	5÷0.25=
7.8÷0.01=	5.4÷0.6=	3.2÷5=	7×0.62=
0.56÷0.8=	7.4-2.8=	0.18÷0.2=	0.16÷8=
4.5×0.02=	8+7.2=	1.2×30=	0.012×0.2=
7.3×0.3=	9÷6=	3.6÷0.12=	7.8÷0.6=
2÷5=	4.5+5=	0.3÷0.6=	0.96÷0.2=
10.5×0.4=	7.3+0.27=	8×0.125=	0.54÷0.6=
0.61+0.39=	0.56÷28=	10÷20=	4.08÷0.4=
11-9.4=	0.8×0.11=	0.72+12.8=	5.6÷0.01=
2.3×100=	0.75×100=	0.108÷2=	10.8÷9=
0.7÷0.8=	16-5.07=	4.2×0.4=	0.72×6=
12÷0.5=	5.2×0.4=	12.2÷0.2=	5.6÷100=
0.41+3.7=	0.02×0.5=	7.2-0.8=	1.4×0.5=
84÷0.21=	0.75÷0.25=	2.5×16=	0.108÷2=
1.75+32.5=	16-5.07=	5.2÷13=	1.64÷41=
1.02×0.2=	0.26×0.3=	8.4×0.02=	1.29×6=
0.8×0.05=	12.6÷0.03=	8.71÷0.1=	21÷0.21=
0.8×0.13=	0.34÷17=	8.08÷0.4=	0.5×2.2=
1.24÷4=	3.27+0.63=	5.02×0.3=	0.3×0.5=
6.4÷4=	7.2÷1.8=	0.7÷0.35=	0.72÷1.44=
0.48÷0.04=	1.25÷2.5=	5.5+55=	16.8÷8=
0.54+2.2=	3.5-0.05=	2÷0.02=	0.25×40=
1.5×0.6=	0.32÷0.8=	12.25÷0.5=	73.5×0.1=
46.5+52.5=	0.45×102=	1.25×88=	2.64+3.85+1.54=
8×1.25=	5.6÷3.5=	4.2÷0.7÷6=	0.4×8.6×25=
0.27÷0.3=	2.5×101=	0.65×101-0.65=	2.6×7÷2.6×7=

Answer 1

分析：根據(jù)小數(shù)四則混合運算的順序計算，大多是口算較簡單．

解答：

解：4.7+2.3=7	4.5×2=9	6.9-2.5=4.4	7.2×0.8=5.76
6×3.4=20.4	0.62-0.32=0.3	1.4×0.5=0.7	0.75×100=75
0.02×0.5=0.01	3.6÷0.3=12	6.3÷7=0.9	5.6÷100=0.056
0.75÷0.25=3	0.125×8=1	4.8÷0.3=16	0.96÷2=0.48
0.56÷28=0.02	0.36÷0.4=0.9	0.64÷0.8=0.8	0.72÷3.6=0.2
3.6÷24=0.15	0.8×1.1=0.88	7.2+12.8=20	46.7-3.8=42.9
12.8÷4=3.2	5.2÷13=0.4	12.5÷5=2.5	1.64÷41=0.04
10÷20=0.5	24÷15=1.6	8.65×10=86.5	0.35×0.6=0.21
3.08×0.01=0.0308	4.95×1000=4950	6.9×0.1=0.69	0.4×0.5=0.2
2.4÷0.8=3	10.8÷9=1.2	9.6÷0.8=12	0.108÷2=0.054
4.95÷0.9=5.5	9.65÷0.1=96.5	0.325×100=32.5	2.5×8=20
0.56÷0.7=0.8	0.125×4=0.5	3.28×0.1=0.328	3.9÷0.13=30
7.2×0.1=0.72	0.01×0.1=0.001	0.25×0.4=0.1	1.6÷0.8=2
1÷2.5=0.4	1.25×0.8=1	3.2÷0.04=80	0÷1.7=0
0.22×102=22.44	9.6÷0.8=12	5×0.24=1.2	4.5-0.05=4.45
3.9÷0.13=30	16.5÷0.5=33	5×0.12=0.6	24×0.5=12
4.8×0.5=2.4	2.8+4.2=7	0.84÷2.1=0.4	5÷0.25=20
7.8÷0.01=780	5.4÷0.6=9	3.2÷5=0.64	7×0.62=4.34
0.56÷0.8=0.7	7.4-2.8=4.6	0.18÷0.2=0.9	0.16÷8=0.02
4.5×0.02=0.09	8+7.2=15.2	1.2×30=36	0.012×0.2=0.0024
7.3×0.3=2.19	9÷6=1.5	3.6÷0.12=30	7.8÷0.6=13
2÷5=0.4	4.5+5=9.5	0.3÷0.6=0.5	0.96÷0.2=4.8
10.5×0.4=4.2	7.3+0.27=7.57	8×0.125=1	0.54÷0.6=0.9
0.61+0.39=1	0.56÷28=0.02	10÷20=0.5	4.08÷0.4=10.2
11-9.4=1.6	0.8×0.11=0.088	0.72+12.8=13.52	5.6÷0.01=560
2.3×100=230	0.75×100=75	0.108÷2=0.054	10.8÷9=1.2
0.7÷0.8=0.875	16-5.07=10.93	4.2×0.4=1.68	0.72×6=4.32
12÷0.5=24	5.2×0.4=2.08	12.2÷0.2=61	5.6÷100=0.056
0.41+3.7=4.11	0.02×0.5=0.01	7.2-0.8=6.4	1.4×0.5=0.7
84÷0.21=400	0.75÷0.25=3	2.5×16=40	0.108÷2=0.054
1.75+32.5=34.25	16-5.07=10.93	5.2÷13=0.4	1.64÷41=0.04
1.02×0.2=0.204	0.26×0.3=0.078	8.4×0.02=0.168	1.29×6=7.74
0.8×0.05=0.04	12.6÷0.03=420	8.71÷0.1=87.1	21÷0.21=100
0.8×0.13=0.104	0.34÷17=0.02	8.08÷0.4=20.2	0.5×2.2=1.1
1.24÷4=0.31	3.27+0.63=3.9	5.02×0.3=1.506	0.3×0.5=0.15
6.4÷4=1.6	7.2÷1.8=4	0.7÷0.35=2	0.72÷1.44=0.5
0.48÷0.04=12	1.25÷2.5=0.5	5.5+55=60.5	16.8÷8=2.1
0.54+2.2=2.74	3.5-0.05=3.45	2÷0.02=100	0.25×40=10
1.5×0.6=0.9	0.32÷0.8=0.4	12.25÷0.5=24.5	73.5×0.1=7.35
46.5+52.5=99	0.45×102=45.9	1.25×88=110	2.64+3.85+1.54=8.03
8×1.25=10	5.6÷3.5=1.6	4.2÷0.7÷6=1	0.4×8.6×25=8.6
0.27÷0.3=0.9	2.5×101=252.5	0.65×101-0.65=65	2.6×7÷2.6×7=49

點評：此題主要考查了學(xué)生的口算能力．