4×(25×25+25×175)
分析:通過(guò)觀察,運(yùn)用乘法分配律簡(jiǎn)算.
解答:解:4×(25×25+25×175),
=4×25×25+4×25×175,
=100×25+100×175,
=100×(25+175),
=100×200,
=20000.
點(diǎn)評(píng):認(rèn)真分析數(shù)據(jù),選用合適的簡(jiǎn)便方法計(jì)算.
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科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:

1.23÷3= 0.8×11= 1-0.75=
1.7×0.4= 0.36÷12= 1.6+0.38=
1.2÷0.3= 0.75×4= 15×0.4=
2.14-0.9= 4×0.25= 10÷2.5=
0.4×52= 1.6×0.4= 9.6÷6=
4.3-0.4= 7-6.2= 0.86-0.3=
8.8÷2.2= 2.6÷0.2= 0.15×3=
0.9÷0.45= 0.27÷3= 0.51+1.7=
0.6÷0.5= 0.125×8= 0.38×1000=
6.8-1.7= 2.4×0.2= 32.8+19=
0.56÷14= 1÷0.05= 6÷12=
0.14×5= 3×1.4= 4.9÷0.7=
0.4÷8= 6.3+3.7= 3.5×0.2=
0.2×12.6×5= 8.4÷4.2= 2.4×0.5=
0÷3.5×0.2= 0×9.7+2.3= 1.6×9+1.6=
3.8+1.2= 4.8÷0.3= 530+270=
7.6÷3.8= 92÷2.3= 9.6-1.6=
7.2+2.8= 2.63+0.37= 0.67+1.24=
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0.25×8=
 
16÷1.6=
 
26.1-3.5-7.5=
 
   

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科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:

口算
1.2÷0.2=
2.5×4= 0.25+4= 1.87×0=
3.5+0.5= 1.2÷0.4= 3.6÷4= 0÷1.25=
0.12×6= 0.64×0.03= 5.8+4.2-6.5= 7.8÷3=
0.125×8= 2.8÷1.4= 0.25÷0.5= 7.21÷7=
0.35÷10= 3.6÷3= 6.3÷0.9= 0.54÷6=
0.3×0.1= 1.3÷2= 0.4÷8=2 7.3÷3=
0.51÷0.3= 15÷0.01= 5÷10= 0.7×12=
0.2×0.5= 3.8×0.1= 0.2×0.2= 0.04×0.4=
12.4+7.6= 8×0.5= 0.72÷36= 9×2.5+2.5=
1.8÷3= 2.3÷2= 6.5÷5= 2.14÷2=
2.5×4= 2.7×2= 0.5×7= 4.8+3.6+5.2=
3.4÷1.7= 2.5+0.2= 4.5÷5= 5+2.8=
0.8×0.3= 13.5×2×0= 5.25÷5= 4×2.2=
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科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:

在下面的空格上填數(shù),并寫根據(jù)什么運(yùn)算定律.
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×
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(2)3.2×0.125×8=3.2×(
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8
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乘法結(jié)合律
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(3)89.8×99+89.8=
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99
99
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1
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(4)7×5×3.2=7×(
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(5)2.5×(0.8+4)=2.5×0.8+
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720÷8÷9= 2.9+5.7+2.1= 2-0.16-0.64=
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科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:閱讀理解

4.7+2.3= 4.5×2= 6.9-2.5= 7.2×0.8=
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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=
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0.8×0.13= 0.34÷17= 8.08÷0.4= 0.5×2.2=
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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=
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