4+4.73=________ | ÷9=________ | ×÷×=________ | 4 -4 =________ |
375÷1 =________ | ×2÷×2=________ | 36+0.4=________ | 5×32×2.5=________ |
1÷0.9=________ | 8×(12+0.5)=________ | =________ | =________ |
=________ | =________ | =________ | =________ |
=________ | =________ | =________ | =________ |
=________ | =________ | =________ | =________ |
35+0.4=________ | 8×(12+0.5)=________ | 4×0.8×2.5×12.5=________ | =________ |
=________ | =________. |
分析:×÷×,×2÷×2,先把除法變成乘法,再根據(jù)乘法結(jié)合律簡算;
5×32×2.5先把32分解成8×4,再運(yùn)用乘法結(jié)合律簡算;
,運(yùn)用加法結(jié)合律簡算;
4×0.8×2.5×12.5運(yùn)用乘法結(jié)合律簡算;
先算乘法,再根據(jù)連續(xù)減去兩個數(shù)等于減去這兩個數(shù)的和簡算;
先去掉小括號,然后再根據(jù)加法結(jié)合律簡算,最后算括號外的乘法;
先把分解成,然后再運(yùn)用加法結(jié)合律簡算;
其它題目根據(jù)運(yùn)算法則直接求解.
解答:
4+4.73=8.73, | ÷9=, | ×÷×=, | 4-4=, |
375÷1=, | ×2÷×2=4, | 36+0.4=36.4, | 5×32×2.5=400, |
1÷0.9=, | 8×(12+0.5)=100, | =8, | =, |
=, | =, | =5.925, | =12, |
=, | =2, | =, | =, |
=5.7, | =3, | =, | =, |
35+0.4=35.4, | 8×(12+0.5)=100, | 4×0.8×2.5×12.5=100, | =20, |
=, | =1110. |
點(diǎn)評:本題注意簡算方法的運(yùn)用,運(yùn)算定律是常用的簡便運(yùn)算的方法,要熟練掌握,靈活運(yùn)用.
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直接寫出得數(shù). 4+4.73= 8.73 8.73 |
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4
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375÷1
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4 4 |
36+0.4= 36.4 36.4 |
5×32×2.5= 400 400 | ||||||||||||||||||||||||||
1÷0.9=
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8×(12+0.5)= 100 100 |
9-
8
8
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1÷
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5
5.925 5.925 |
6+6-
12 12 | ||||||||||||||||||||||||||
4×
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1÷
2 2 |
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5
5.7 5.7 |
5÷
3 3 |
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35+0.4= 35.4 35.4 |
8×(12+0.5)= 100 100 |
4×0.8×2.5×12.5= 100 100 |
21-
20 20 | ||||||||||||||||||||||||||
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1110 1110 . |
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180÷60= | 12×25= | 0÷90= |
4×5÷4×5= | 0.25×4+4= | 131+218+269+182= |
25×6×4= | 420÷35= | 36×5×4= |
120÷5÷3= | 198-75-25= | 120-20÷5= |
59億-58億= | (1.3+3.5)÷0.6= | 75÷2.5= |
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0.1÷0.01×0.1= | 9.9+9.9×99= | 2.7×3.6+6.4×2.7= |
720÷8÷9= | 2.9+5.7+2.1= | 2-0.16-0.64= |
16.7+84.5-16.7= | 6.8-(3.8+2.9)= | 9×1.3+9×6.7= |
5.5-5.25+5.2= | 0.8×25-10= | 42.8×25×4= |
7.2+2.8= | 0.9÷0.01= | 3.5+7.6= |
3×0.2×0.5= | 0.96÷0.3= | 1.5×0.4= |
7÷0.25= | 2.5×0.7×0.8= | 8-2.5= |
16÷1.6= | 5.6×1.01= | 8×(2.5+0.25)= |
0.36+0.64= | 64.32÷16= | 72.8÷0.8= |
8.4×0.2+1.6×0.2= | 8.4÷4.2= | 0.05×0.8= |
2.56-0.37= | 1.23×3= | 25×0.8×0.5= |
12×2.5= | 3.2÷1.6= | 3.5+3.5×3= |
19.6÷2= | 8.8÷2.2= | 3.9+2.03= |
7.2×0.3+2.8×0.3= | 13.8+9.9= | 2.4×2.5= |
0.75×4= | (1.5+0.25)×4= | 4.2÷0.1= |
4.2÷3.5= | 2.14-0.9= | 27+456+73= |
12÷0.3= | 2.87÷0.7= | 13÷4= |
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13.65÷13= | 4×0.8×0.25×1.25= | 13+0.7÷0.7= |
7.05×23.7+7.05×76.3= | 0.125×3.2×2.5= | (12+23.1÷0.75)×0.4-5.12= |
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1.6×[(12-7.2)÷(0.84÷2.1)]= |
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科目:小學(xué)數(shù)學(xué) 來源: 題型:解答題
180÷60= | 12×25= | 0÷90= |
4×5÷4×5= | 0.25×4+4= | 131+218+269+182= |
25×6×4= | 420÷35= | 36×5×4= |
120÷5÷3= | 198-75-25= | 120-20÷5= |
59億-58億= | (1.3+3.5)÷0.6= | 75÷2.5= |
0.45÷1.25÷8= | 2.5×7.6×4= | 97.6÷0.02= |
8.8-(0.25+0.4)= | 0.25+87+0.75= | 0.8-0.35×2= |
0.1÷0.01×0.1= | 9.9+9.9×99= | 2.7×3.6+6.4×2.7= |
720÷8÷9= | 2.9+5.7+2.1= | 2-0.16-0.64= |
16.7+84.5-16.7= | 6.8-(3.8+2.9)= | 9×1.3+9×6.7= |
5.5-5.25+5.2= | 0.8×25-10= | 42.8×25×4= |
7.2+2.8= | 0.9÷0.01= | 3.5+7.6= |
3×0.2×0.5= | 0.96÷0.3= | 1.5×0.4= |
7÷0.25= | 2.5×0.7×0.8= | 8-2.5= |
16÷1.6= | 5.6×1.01= | 8×(2.5+0.25)= |
0.36+0.64= | 64.32÷16= | 72.8÷0.8= |
8.4×0.2+1.6×0.2= | 8.4÷4.2= | 0.05×0.8= |
2.56-0.37= | 1.23×3= | 25×0.8×0.5= |
12×2.5= | 3.2÷1.6= | 3.5+3.5×3= |
19.6÷2= | 8.8÷2.2= | 3.9+2.03= |
7.2×0.3+2.8×0.3= | 13.8+9.9= | 2.4×2.5= |
0.75×4= | (1.5+0.25)×4= | 4.2÷0.1= |
4.2÷3.5= | 2.14-0.9= | 27+456+73= |
12÷0.3= | 2.87÷0.7= | 13÷4= |
24÷4+56÷4= | 2.1×0.3÷2.1= | 2.3-0÷8.1= |
1.37-1.37÷1.37= | 4.4÷(5×0.2)= | 7×1.3= |
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7.05×23.7+7.05×76.3= | 0.125×3.2×2.5= | (12+23.1÷0.75)×0.4-5.12= |
728+199= | 637-201= | 16×25= |
1.6×[(12-7.2)÷(0.84÷2.1)]= |
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