mental arithmetic exercises

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

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

(' 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 (

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

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

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: "

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

) 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

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[0]) 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

()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 ('