What is 80 x 4 ?
Answer : 80x4 = 320

OR

How to easy to calculate 80x4 ?
First 8x4 without 0 and get 32
Second, you get 32 multiply by 10 and you get 320

What is 80 x 4 ? Answer : 80x4 = 320

Example, I will give you an example, make you easy to learn

80x1 = 80
80x2 = 160
80x3 = 240
80x4 = 320
80x5 = 400
80x6 = 480
80x7 = 560
80x8 = 640
80x9 = 720
80x10 =  800

80x11 = 880
80x12 = 960
80x13 = 1040
80x14 = 1120
80x15 = 1200
80x16 = 1280
80x17 = 1360
80x18 = 1440
80x19 = 1520
80x20 = 1600

Example 2, if hard to understand I will give you example 2

80x1 = 80 = 80
80x2 = 80+80 = 160
80x3 = 80+80+80 = 240
80x4 = 80+80+80+80 = 320
80x5 = 80+80+80+80+80 = 400
80x6 = 80+ 80+80+80+80+80 = 480
80x7 = 80+80+ 80+80+80+80+80 = 560
80x8 = 80+80+80+ 80+80+80+80+80 = 640
80x9 = 80+80+80+80+ 80+80+80+80+80 = 720
80x10 =  80+80+80+80+80+ 80+80+80+80+80 = 800


If you hard to understand, please comment under this article, thanks

It's easy if you use a calculator, thank




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