(1)0.125×0.32×5=
(2)數(shù)學(xué)公式=
(3)數(shù)學(xué)公式=
(4)35000÷28×8=
(5)222×555=
(6)數(shù)學(xué)公式=
(7)0.125×0.25×0.5×64=
(8)數(shù)學(xué)公式=

解:
(1)0.125×0.32×5,
=0.125×(0.8×0.4)×5,
=(0.125×0.8)×(0.4×5),
=0.1×2,
=0.2;

(2),
=1.25×0.25×16,
=1.25×0.25×(8×2),
=(1.25×8)×(0.25×2),
=10×0.5,
=5;

(3)
=0.25×1.25×64,
=0.25×1.25×(8×8),
=(0.25×8)×(1.25×8),
=2×10,
=20;

(4)35000÷28×8,
=35000÷(7×4)÷8,
=35000÷7÷4×8,
=(35000÷7)×(8÷4),
=5000×2,
=10000;

(5)222×555,
=(2×111)×(5×111),
=(2×5)×(111×111),
=10×12321,
=123210;

(6),
=8888×(875×),
=8888×125,
=(8×1111)×125,
=1111×(8×125),
=1111×1000,
=1111000;

(7)0.125×0.25×0.5×64,
=0.125×0.25×0.5×(8×4×2),
=(0.125×8)×(0.25×4)×(0.5×2),
=1×1×1,
=1;

(8),
=1993÷,
=1993÷
=1993÷,
=1993×
=
分析:(1)根據(jù)乘法交換律和結(jié)合律進(jìn)行計(jì)算;
(2)根據(jù)乘法交換律和結(jié)合律進(jìn)行計(jì)算;
(3)根據(jù)乘法交換律和結(jié)合律進(jìn)行計(jì)算;
(4)根據(jù)除法的性質(zhì)進(jìn)行簡(jiǎn)算;
(5)222=2×111,555=5×111,然后再根據(jù)乘法交換律和結(jié)合律進(jìn)行計(jì)算;
(6)根據(jù)乘法交換律和結(jié)合律進(jìn)行計(jì)算;
(7)根據(jù)乘法交換律和結(jié)合律進(jìn)行計(jì)算;
(8)1993,化成假分?jǐn)?shù),分子根據(jù)乘法分配律進(jìn)行計(jì)算,然后再根據(jù)分?jǐn)?shù)的除法的計(jì)算方法,進(jìn)行計(jì)算.
點(diǎn)評(píng):考查了運(yùn)算定律與簡(jiǎn)便運(yùn)算,四則混合運(yùn)算.注意運(yùn)算順序和運(yùn)算法則,靈活運(yùn)用所學(xué)的運(yùn)算律簡(jiǎn)便計(jì)算.
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目:小學(xué)數(shù)學(xué) 來源: 題型:

口算
9.5×100=
1.25×8 0.25×0.9×4= 1.87×0=
3.5-1.5= 1.2×0.4= 3.6×0.5= 0.6×5=
0.24+0.6= 0.64×0.03= 7.8+2.2-1.5= 8×0.05=
0.125×8= 1.3×4= 0.4×0.6= 3×0.08=
0.35×2= 2.9×0.3= 10-0.9= 5.67×0=
0.8×0.01= 2.5×0.2= 2.4×0.3= 1.6×0.25=
0.17×0.3= 15×0.01= 10×0.07= 0.7×0.05=
0.2×0.05= 7.8×0.01= 0.2×0.26= 0.04×4=
12.4+2.1= 0.08×0.5= 0.14×4= 9×2.5+9×1.5=
1.8×0.5= 2.3×5= 0.3×3.6= 8×0.9+8×2.1=
2.5×4= 0.8+2.7×2= 0.05×7= 4.8+2.1+7.9=
3.4-1.8= 2.5+0.2×2= 0.02×0.1= 5.4-2.8=
0.3×0.2= 3.5×2×0.1= 0.3×0.3= 0×10.3×2.2=
0.12×0.7= 0.2×0.5= 0.92×0.4= 6.7-1.43=
1.2×4= 1.3×2= 1.2×0.3= 4.6+5.08=

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來源: 題型:

1÷8×9.9+1.9×0.125-0.125                     
0.64×125×2.5.

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來源: 題型:閱讀理解

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=

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來源: 題型:解答題

1125-997=998+1246+9989=(8700+870+87)÷87=125×8.8=
1.3+4.25+3.7+3.75=17.15-(3.5-2.85)=3.4×99+3.4=4.8×1.01=
0.4×(2.5÷73)=(1.6+1.6+1.6+1.6)×25    數(shù)學(xué)公式+數(shù)學(xué)公式-數(shù)學(xué)公式)÷數(shù)學(xué)公式=數(shù)學(xué)公式=
12.3-2.45-5.7-4.55=數(shù)學(xué)公式÷2數(shù)學(xué)公式+數(shù)學(xué)公式×數(shù)學(xué)公式=0.125×0.25×64=64.2×87+0.642×1300=
78×36+7.8×741-7數(shù)學(xué)公式=數(shù)學(xué)公式×17+數(shù)學(xué)公式×8=數(shù)學(xué)公式×數(shù)學(xué)公式+0.125×數(shù)學(xué)公式+0.5=2.42÷數(shù)學(xué)公式+4.58×數(shù)學(xué)公式-4÷3=
25÷100數(shù)學(xué)公式=4.25-3數(shù)學(xué)公式-(2數(shù)學(xué)公式-1數(shù)學(xué)公式)=3.8÷3.9+3.9÷0.1+0.1÷3.9=12.1-(數(shù)學(xué)公式+數(shù)學(xué)公式)×105=

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來源: 題型:解答題

9.5×100=1.25×80.25×0.9×4=1.87×0=
3.5-1.5=1.2×0.4=3.6×0.5=0.6×5=
0.24+0.6=0.64×0.03=7.8+2.2-1.5=8×0.05=
0.125×8=1.3×4=0.4×0.6=3×0.08=
0.35×2=2.9×0.3=10-0.9=5.67×0=
0.8×0.01=2.5×0.2=2.4×0.3=1.6×0.25=
0.17×0.3=15×0.01=10×0.07=0.7×0.05=
0.2×0.05=7.8×0.01=0.2×0.26=0.04×4=
12.4+2.1=0.08×0.5=0.14×4=9×2.5+9×1.5=
1.8×0.5=2.3×5=0.3×3.6=8×0.9+8×2.1=
2.5×4=0.8+2.7×2=0.05×7=4.8+2.1+7.9=
3.4-1.8=2.5+0.2×2=0.02×0.1=5.4-2.8=
0.3×0.2=3.5×2×0.1=0.3×0.3=0×10.3×2.2=
0.12×0.7=0.2×0.5=0.92×0.4=6.7-1.43=
1.2×4=1.3×2=1.2×0.3=4.6+5.08=

查看答案和解析>>

同步練習(xí)冊(cè)答案