5-3數(shù)學(xué)公式÷（1數(shù)學(xué)公式+2.25×數(shù)學(xué)公式）

解：5-3÷（1+2.25×），
=5-3÷（1+2.25×），
=5-3÷（+×），
=5-÷（），
=5-÷，
=5-，
=5-1.5，
=3.5．
分析：本題根據(jù)四則混合運算的運算順序計算即先算小括號內(nèi)部的，再計算小括號外面的．
點評：本題考查了學(xué)生分數(shù)小數(shù)混合運算能力及做題的認真程度．
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78÷1.3= 15÷0.3= 2.1+1.49= 6.24-1.5=
1.2×0.3= 6.3÷6.3= 1.6×0.2= 3.7-1.2=
4.58-3.5= 72.8÷8= 3.5×0.3= 0.25×100=
3.2-2= 0.51÷17= 5.3÷0.01= 1.03×3=
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0.62-0.32= 6.3÷0.21= 1.7×10= 0.12×3=
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0.25×8= 0.89÷8.9= 17.8+2.2= 0.8÷0.2=
5.79÷0.1= 0.35+0.65= 8.9-0.9= 9.2-9.2=
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科目：小學(xué)數(shù)學(xué) 來源： 題型：

180÷60= 12×25= 0÷90=
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0.45÷1.25÷8= 2.5×7.6×4= 97.6÷0.02=
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0.1÷0.01×0.1= 9.9+9.9×99= 2.7×3.6+6.4×2.7=
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4.7+2.3= 4.5×2= 6.9-2.5= 7.2×0.8=
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7.3×0.3= 9÷6= 3.6÷0.12= 7.8÷0.6=
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1.24÷4= 3.27+0.63= 5.02×0.3= 0.3×0.5=
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（2012?西城區(qū)）
37-21= 850÷100=
3
4
+
2
5
=
5
6
÷
5
4
=
4
9
-
5
18
=
4
9
×12=		 12×5= 4.4×1.1=
1
4
×
1
4
=
16
35
×
5
36
=		 36÷3= 3-2.55=
7
15
÷
7
5
=
9
4
÷
3
8
=		 210×10=
5
8
+
3
8
=
2
3
×
6
11
=		 0.95=
95
95
%           		 9.5-8.7=
6
7
-
1
7
=
0÷
19
22
=		 1.12=
112
112
%          		 0.6+0.13=
3
5
+
3
5
=
2×
7
8
=
2
5
=
40
40
%        		 0.4×0.9=
1
2
-
1
3
=
3
8
÷
1
3
=
11
50
=
22
22
%        		 2.4÷0.3=
2
3
+
1
6
=
17
24
×24=		 75%=
(     )
(     )
 1.2-1.16=
7
4
-
1
2
=
9÷8= 15%=
(     )
(     )
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科目：小學(xué)數(shù)學(xué) 來源： 題型：解答題

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÷0.1316.5÷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=

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