0.25×1.25×4×8       
2.125×數(shù)學(xué)公式+1.875÷4.

解:(1)0.25×1.25×4×8
=(0.25×4)×(1.25×8)
=1×10
=10;

(2)2.125×+1.875÷4
=2.125×+1.875×
=(2.125+1.875)×
=4×
=1.
分析:(1)根據(jù)乘法交換律和乘法結(jié)合律進(jìn)行計(jì)算即可得到答案;
(2)將算式中除以4改寫成乘以,然后再利用乘法分配律進(jìn)行計(jì)算.
點(diǎn)評(píng):此題主要考查的是小數(shù)的簡(jiǎn)便運(yùn)算和分?jǐn)?shù)的簡(jiǎn)便運(yùn)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(lái)源: 題型:

口算.
0.06×9
2.7+0.27 0.3×0.9 0.25×1.6
1.4÷2 0×0.465 0.7×0.7 2.1÷0.7
0.75÷1 0.1÷2 55+0.1 2.56÷0.256
0.25×4 2.25÷0.5 7.2÷0.6 2×7.85×0.5
0.48÷4 1.25×8 0.04÷2 0.9+2.45+2
1.6÷0.2 10÷0.25 0.01×0.2 8.94-(1.94-0.59)

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:

(2012?浦城縣)計(jì)算下面各題,能簡(jiǎn)算的要簡(jiǎn)算.
(1)25×1.25×32
(2)(3.75+4.1+2.35)×9.8
(3)5400-2940÷28×27
(4)(20.2×0.4+7.88)÷4.2
(5)12×(
1
3
+
1
4
-
1
6

(6)8.5×99.

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:

1.8+0.5= 2.5-0.1= 4.8-0.2= 74+71=
48+10= 24÷12= 68÷0.68= 94.7÷0.1=
61.8÷0.6= 0.8×6.7= 3÷8= 0.12×3=
32= 8.2-2.8= 3.5÷0.7=
4
5
-
1
5
=
1
3
+
1
4
=
1
16
+
7
16
=
5.3+0.5= 46+18=
8.5-1.5= 69+10= 28.8+0.4= 40.5÷0.5=
92.7÷0.3= 0.5×1.3= 16×0.5= 4.4+0.1=
6.1-0.1= 3.3+0.6= 33.2÷0.4= 1÷0.25=
1.5×4= 6.5+1.35= 1.3-1.2=
7
8
-
1
4
=
1
2
+
3
4
=
5
6
-
1
3
=
5.7-1.7= 0.35+0.75=
0.2×1.1= 1.6÷0.4= 10÷4= 3.4÷0.2=
52÷13= 57÷19= 3.7-0.8= 29+92=
8.2+0.7= 6.5-5.6= 4.8÷0.3= 33=
1.25×8=
2
3
+
1
6
=
1
2
-
1
3
=
7
9
+
1
9
=
2.1÷0.3= 3.2×3= 2.8-1.8= 0.9×6.2=

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:

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=
0.96÷0.06= 0.36×0.3= 0.35÷0.7=
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=
728+199= 637-201= 16×25=
1.6×[(12-7.2)÷(0.84÷2.1)]=

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來(lái)源: 題型:

(2010?尤溪縣模擬)0.25×1.25×4×8               
 2.125×
14
+1.875÷4.

查看答案和解析>>

同步練習(xí)冊(cè)答案