3.14×8=0.8×40%=0.125×32=數(shù)學公式-數(shù)學公式=
4.5×102=0.52-0.32=10×10%=數(shù)學公式÷7×數(shù)學公式=
3.14×0.9+3.14×0.1=52×20%=30÷75%=6÷(數(shù)學公式-數(shù)學公式)=

解:
3.14×8=25.12,0.8×40%=0.32,0.125×32=4,-=,
4.5×102=459,0.52-0.32=0.16,10×10%=1,÷7×=,
3.14×0.9+3.14×0.1=3.14,52×20%=10.4,30÷75%=40,6÷(-)=36.

分析:本題根據(jù)小數(shù)、分數(shù)的加法、減法、乘法與除法的運算法則及四則混合運算的運算順計算即可;
0.125×32可將32拆分為8×4計算;
4.5×102可將102拆分為100+2后根據(jù)乘法分配律計算;
÷7×可根據(jù)乘法交換律計算;
3.14×0.9+3.14×0.1可根據(jù)乘法分配律計算.
點評:完成本題要注意分析式中數(shù)據(jù)的特點及內(nèi)在聯(lián)系,然后運用合適的方法計算.
練習冊系列答案
相關(guān)習題

科目:小學數(shù)學 來源: 題型:

3.14×8= 0.8×40%= 0.125×32=
7
8
-
5
6
=
4.5×102= 0.52-0.32= 10×10%=
1
7
÷7×
1
7
=
3.14×0.9+3.14×0.1= 52×20%= 30÷75%= 6÷(
1
2
-
1
3
)=

查看答案和解析>>

科目:小學數(shù)學 來源: 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:小學數(shù)學 來源: 題型:

直接寫得數(shù).
2+8= 0.8×4= 0.2+0.8÷2= 1÷0.125= 60×5%=
1-
4
9
-
5
9
=
1-
1
3
+
2
3
=
3.2÷
1
2
=
1
6
×6÷
1
6
×6=
1
4
-
1
10
)×20=

查看答案和解析>>

科目:小學數(shù)學 來源: 題型:

14.6×3.8-3.8×4.6 53+79+47+121
2
3
×
4
5
+
4
5
×
2
3
2.5×(4+0.3)
12×(
2
3
+
1
2
-
1
4
4
5
×(
5
4
+0.3)
956-5.8-4.2 68.6×28+31.4×28.

查看答案和解析>>

科目:小學數(shù)學 來源: 題型:

(2009?綿陽)
口算
2
7
-
2
7
÷3=
1
4
×8÷
1
4
×8=
4.5×101= 31.7-10.8=
1
5
=
1
4
-
1
7
=
1+0.5%= 10.5÷5= 3.14÷0.01= 0.42=

查看答案和解析>>

同步練習冊答案