六年级数学计算题专项训练.doc

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小升初总复习——数与代数
——计算能力过关专项训练
学习目标
1. 对简单计算题，能快速、准确写出答案。
2. 能熟练化简比及求比值；并理解二者之间的区别。
3. 能熟练进行四则混合运算，熟练掌握四则混合运算的计算顺序。
4. 能熟练解方程。
5. 能熟练运用比例的基本性质解比例。
6. 读懂文字题，能正确列式计算。
实例演练
1．直接写出得数。
×= &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 7×= &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ×= &nbsp; &nbsp; &nbsp; &nbsp; ×= &nbsp; &nbsp; &nbsp; &nbsp;×12=
×24= &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;÷2= &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;12÷= &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;1÷= &nbsp; &nbsp; &nbsp; &nbsp;×=
÷= &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 8÷= &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ÷= &nbsp; &nbsp; &nbsp; &nbsp; ÷= &nbsp; &nbsp; &nbsp; &nbsp; ÷3=
×= &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; －= &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;×= &nbsp; &nbsp; &nbsp; &nbsp; 240÷= &nbsp; &nbsp; &nbsp; ×= &nbsp; &nbsp; &nbsp;
÷= &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;×12= &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ÷= &nbsp; &nbsp; &nbsp; &nbsp; ×= &nbsp; &nbsp; &nbsp; &nbsp;÷=
1÷= &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;÷3 = &nbsp; &nbsp; &nbsp; &nbsp; （+）×12= &nbsp; &nbsp; &nbsp; 1－÷=
÷×1= &nbsp; &nbsp; &nbsp; &nbsp;÷×= &nbsp; &nbsp; &nbsp;×÷= &nbsp; &nbsp; &nbsp; &nbsp;（＋）×=

2、求比值
1 ： &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 0.12 : 0.3
3．化成最简单的整数比。
: &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;5.6 : 0.7 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 15 : 12

4．计算下面各题，能简算的用简便方法算。
（1）×24 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; （2）× &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; （3）（－）×
（4）×× &nbsp; &nbsp; &nbsp; &nbsp; （5）（+）×28 &nbsp; &nbsp; &nbsp; （6）×+×

（7）3－÷ &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; （8）×÷

&nbsp;

（9）× + ÷11 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; （10）（－）÷

（11） &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;（12）

（13） &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;（14）（）÷

5．解方程。
（1） = &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;（2）+=

（3） &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; （4）

（5）-50%=12 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; （6）

（7）χ－χ=240 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; （8）

6.解比例
（1）∶6 = ∶ &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; （2） ∶ &nbsp;=∶

（3）∶ &nbsp;= 2∶6 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; （4） ∶ = 5％∶0.1 &nbsp; &nbsp; &nbsp; &nbsp;

7.列式计算
(1) 12乘的积，与12除以的商相差多少？

(2)12的25%比一个数多62.5%,求这个数?(用方程)

&nbsp;(3) 在面积为20平方厘米的正方形内画一个最大的圆,圆的面积是多少?

用简便方法计算
（1）1125－997 &nbsp; &nbsp; &nbsp; &nbsp; （2） 998+1246+9989&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;（3）（8700＋870＋87）÷87

（4）125×8.8 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;（5）1.3＋4.25＋3.7＋3.75 &nbsp; &nbsp; （6） 17.15－（3.5－2.85）

（7）3.4×99＋3.4 &nbsp; &nbsp; &nbsp; &nbsp; （8） 4.8×1.01 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;（9）0.4×（2.5÷73） &nbsp;&nbsp;

（10）（1.6＋1.6＋1.6＋1.6）×25 &nbsp; （11）（＋－）÷ &nbsp; （12）

（13）12.3－2.45－5.7－4.55 &nbsp; &nbsp;（14）÷2＋× &nbsp; &nbsp;（15） 0.125×0.25×64

（16）64.2×87＋0.642×1300 &nbsp; （17）78×36＋7.8×741－7 &nbsp;（18）×17＋×8

（19）×＋0.125×＋0.5 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;（20）2.42÷+4.58×－4÷3 &nbsp; &nbsp;

（21） 25÷100 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;（22）4.25－3－(2－1) &nbsp;

（23）3.8÷3.9＋3.9÷0.1＋0.1÷3.9 &nbsp; （24）12.1－(+)×105

自我评价 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
1.直接写出得数。
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
＝ &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
2.解方程。
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;

&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;

&nbsp;

&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
3.计算下面各题，能简算的要用简便方法算。
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;×58＋×41＋ &nbsp;

&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;

&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
4.先化简比，再求比值。
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;

第 5 页 共 5 页 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 千淘万漉虽辛苦，浪尽狂沙始见金。</p>