Math Tutor

08/26/2021

Tough Multiplication

When multiplying large numbers, if one of the numbers is even, divide the first number in half, and then double the second number. This method will solve the problem quickly.

For example, 20 x 120

Step 1: Divide the 20 by 2, which equals 10

Step 2: Double 120, which equals 240

Step 2: Then multiply your two answers together

10 x 240 = 2400

The answer to 20 x 120 is 2,400

08/23/2021

Check this out 👇

Take ANY 3-digit #

Write it twice to
make 6-digit number

Example: 371371 or 552552

Divide the
number by 7

Divide it by 11

Divide it by 13

Order of division
is unimportant

Answer = the
3-digit number

08/23/2021

Today’s ‘Math Mazement’

Step 1: Think of a number

Step 2: Multiply it by 3

Step 3: Add 6

Step 4: Divide number by 3

Step 5: Subtract the number
from Step 1 from the answer in Step 4

The answer is always 2!

Winking face with tongue

08/12/2021

Free Mental Math Tips & Tricks

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