# mental arithmetic exercises

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### Math arithmetic _ arithmeticmentalarithmetic with python for Xiao Bao (add subtraction)

Recently fascinated by PythonUse Python to do the math arithmetic mental Arithmetic Practice Program (January 2015 add arithmetic)!Mental arithmetic game for Xiao Bao:#用Python给小宝做的数学算数口算练习程序 (January 2015 add

### Mathematical arithmetic _ Arithmeticmentalarithmetic practice program with Python (add subtraction)

Recently fascinated by Python Use Python to do the math arithmetic mental Arithmetic Practice Program (January 2015 add arithmetic)! Mental arithmetic game for Xiao Bao: #用Python给小宝做的数学算数口算练习程序 (January 2015 add

### Elementary school arithmeticmentalarithmetic practice app---No.3

() {@Overridepublic void OnClick (View arg0) {TODO auto-generated Method StubFinal String B=answer.gettext (). toString ();//Gets the value enteredI1=integer.valueof (b);//convert the acquired value into an orthopedicSwitch (index) {//index is the one that determines which operator in the arrayCase 0:{if (i1== (I2+I3))Toast.maketext (Calculatoractivity.this, "correct, the answer is" +b, Toast.length_short). Show ();ElseToast.maketext (Calculatoractivity.this, "error, correct answer for" + (I3+I

### Elementary school arithmeticmentalarithmetic practice app---No.2

"Android:layout_width= "Wrap_content"android:layout_height= "Wrap_content" >Android:id= "@+id/button1"android:layout_margintop= "50DP"Android:textsize= "30SP"Android:layout_width= "330DP"android:layout_height= "60DP"android:text= "Start"/>On this page to try the page jump (just to a blank page first to get the jump code familiar), but slow to jump, jump code as follows:After a few twists and turns for the following reasons: The new activity needs to be registered, otherwise the operation will be

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### Elementary school arithmeticmentalarithmetic practice app---No.4

();}}});Finish.setonclicklistener (New Onclicklistener () {@Overridepublic void OnClick (View arg0) {//Touch button Event Completion page jump into answer pageTODO auto-generated Method Stubfor (int i = 0; i if (Textutils.isempty (Input[i].gettext ())) {User[i] = "not answered";} else {User[i] = Input[i].gettext (). toString ();}}Ch1.stop (); if (Systemclock.elapsedrealtime ()-ch1.getbase () Intent.setclass (Calculatoractivity.this, resultactivity.class);//JumpStartActivity (Inten

### Elementary school arithmeticmentalarithmetic practice app---No.5

not fixed (for such an array to pass the argument!) ）Layout Activity_resultAndroid:layout_width= "Match_parent"android:layout_height= "Match_parent"android:weightsum= "1" >Xmlns:tools= "Http://schemas.android.com/tools"Android:layout_width= "Match_parent"android:layout_height= "Match_parent"android:paddingbottom= "@dimen/activity_vertical_margin"android:paddingleft= "@dimen/activity_horizontal_margin"android:paddingright= "@dimen/activity_horizontal_margin"android:paddingtop= "@dimen/activity_v

### Mentalarithmetic or ingenious calculation of the square number

See the TV talk about 999*999 mental arithmetic method: First remove a 9, get 99, and then write a 8, then 8 front there are a few 9, after the write a few 0, and finally add 1, get 998001. Sensitive I look at it is certainly the law of mining from the rule of calculation. And it's not so complicated. Please look999*999 = (1000-1) ^2 = 1000*1000-2*1000 + 1 = (1000-2) * 1000 + 1*1So the simpler formula is:

### First program for children: generate a txt mentalarithmetic problem file

Learning python, the child shouted that let me give the export computation, so wrote a generation mental arithmetic problem of the program, I feel very humble, looking forward to the great God to modify, any of your suggestions are my greatest encouragement!#!/usr/bin/env pythonFrom operator Import Add,sub,imulFrom random import Randint,choice,uniformImport OSops={' + ': Add, '-': Sub, ' * ': Imul}def float

### Recently want to write a pupil mentalarithmetic app, first think of the idea of writing down, specific code implementation and so on after the completion of the post

Elementary school mental Arithmetic app idea Parameter settings1) The maximum value of the arithmetic, the minimum value (randomly generated),2) Number of factors3) Operation operator settings (addition, subtraction, addition and subtraction, multiplication, division, multiplication blending, subtraction blending)4) Ari

### Two-digit multiplication of "mentalarithmetic treasure"

Listen up, children:The bits of a product are the product of two digits. The 10-bit is the sum of the two-digit cross-product, the high is the product of dozens of bits, and follows a full 10 forward one.Formula: Product = (10-bit product) (multiplied by dozens of bits x multiplied by digits + multiplied by digits x by dozens of bits) (single-digit product)Example: 23x16= (2x1) (2x6+3x1) (3x6) =3 6 8This article is from "Phper Xuchen-Focus on PHP Technology" blog, be sure to keep this source htt

### Dad's toolbox: Mental computing exercises

It has been a long time for such a thing: The computer automatically issues the question of addition, subtraction, multiplication, division, and reads the question in voice mode. The reason is very simple. Now I am going out to buy some dishes and fruits. When I look for the change, my brain is always short-circuited, which means I cannot calculate it. It is obviously not as easy as before. I want to train my mind on this kind of things. Of course, it's better to buy something later than anyo

### Python input and output exercises, arithmeticexercises, turtle preliminary exercises

(' Enter the length of the first edge:'= float (input (' Enter the length of the second edge: ' = float (input (' Enter the length of the third side:'= (L1+L2+L3)/2= (p* (P-L1) * (P-L2) * (P-L3)) **0.5print(' Triangle area:%.2f'%s)Results:5, calculate the area of the circleR = Float (input (' Enter the radius of the circle:'= r**2*3.14print( The area of the circle is:%.2f '%s ')Results:6, draw a group of same cut roundImport turtleturtle.circle (turtle.circle)turtle.circle(())turtle.circle (

### Python input and output exercises, arithmeticexercises, turtle preliminary exercises

1. Hello world!Print("Hello world! ")2. Simple Interactive (interactive, file-style) textbook P19>>> name = input ("pleaseinput your name:")>>> please input Your name:poonprint(name)>>> Poon3, the user input two numbers, calculate and output two numbers of the sum:S1 = float (Input ("Please input the first num:")) S2= Float (Input ("Please input the second num:")) Sum= S1 +S2Print("The result is:%s"%sum)Print("The result is%.2f"% ((Float (input ("The first num is")) + (float (input ("The secibd

### Python input and output exercises, arithmeticexercises, turtle preliminary exercises

Hello world!Print ("Hello Word")Simple Interactive (interactive, file-style) textbook P19The user enters two numbers and calculates and outputs the sum of two digits:N1=input ("1") n2=input ("2:")Print (Float (N1) +float (n2))The user enters the triangular three-side length and calculates the area of the triangle: (Helen Formula)A = float (input ('input triangle First side length:')) b= Float (Input ('input Triangle Second side length:')) C= Float (Input ('input triangle Third side length:'))#Ca

### Python input and output exercises, arithmeticexercises, turtle preliminary exercises

Print ("Hello world!! ")Name=input ("What is your name?\n") where=input ("where is you now?\n") Age=input ("How is old is you ? \ n")Print("your name is {}". Format (name))Print("You live in {}". Format (where)Print("You is {} years old". Format (age))A=input (" Please enter first number:") b=input (" Please enter a second number:") Sum1=float (a) +float (b)print(" sum of two numbers: {}". Format (SUM1)) a=float (Input ( " first side length: " )) b =float (Input ( " second side length: "

### Python input and output exercises, arithmeticexercises, turtle preliminary exercises

Hello world! Print ('helloWorld') Simple Interactive (interactive, file-style) textbook P19 Name=input ('name=')print('{} Shi ver handsome '. Format (name) the user enters two numbers, calculates and outputs two digits of the sum: a=input ( " a= " ) b =input ( " b= " ) s =float (a) +float (b) print ( " {} " . Format (s)) the user enters a triangular three-edged length and calculates the area of the tr

### Python input and output exercises, arithmeticexercises, turtle preliminary exercises

) Turtle.right (90) Turtle.forward (600) Turtle.right (90) Turtle.forward (400) Turtle.end_fill ()##画大五角星Turtle.penup () Turtle.goto (-263,163) Turtle.pendown () Turtle.color ('Yellow') Turtle.fillcolor ('Yellow') Turtle.begin_fill () Turtle.right (90) forIinchRange (5): Turtle.forward (100) Turtle.right (144) Turtle.end_fill ()##画小五角星##第一个Turtle.penup () Turtle.goto (-126,211) Turtle.pendown () Turtle.color ('Yellow') Turtle.fillcolor ('Yellow') Turtle.begin_fill () Turtle.right (90) forIinchRa

### Python input and output exercises, arithmeticexercises, turtle preliminary exercises

1.Print ("helloWorld") Hello World2.>>> name = input (" Enter Name:") Enter name: Guo Jing print ("{} classmate, Learn python well, promising! " . Format (name) Guo Jing students, learn python, promising! Print ("{} heroes, learn Python, promising! ") " . Format (Name) learned, learn python, promising! Print ("{} brother, learn python, people love! ") . Format (name[1)) Jing elder brother, learn python, people see love!3.N1 = input (" Please enter first number:"= input (" Please enter second

### Python input and output exercises, arithmeticexercises, turtle preliminary exercises

()Turtle.forward (400)Turtle.right (90)Turtle.forward (200)Turtle.right (90)Turtle.forward (400)Turtle.right (90)Turtle.forward (200)Turtle.right (90)Turtle.end_fill ()# Time.sleep (5)Def Draw_big_star ():Turtle.color (' Yellow ')Turtle.fillcolor (' Yellow ')# turtle.speed (1)Turtle.penup ()Turtle.goto (-175,155)Turtle.pendown ()Turtle.begin_fill ()For I in range (5):Turtle.forward (50)Turtle.right (144)Turtle.end_fill ()def draw_smallstar (x, Y, z):Turtle.color (' Yellow ')Turtle.fillcolor ('

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