**Mental Math**

**Multiplication Strategies**

Let us learn some easy and fast ways of multiplication.

**Multiplication by repeated addition:****Multiplication by breaking the number:****Multiplication by the smaller number.****Multiplication by 10****Multiplication of two-digit number which ends with zero by 1-digit.****Multiplication of two-digit number by 1-digit.**- Firstly, multiply 20 by 5.
- Secondly, multiply 4 by 5.
- Thirdly, add both the products.

We can multiply single digit numbers using the concept of repeated addition.

** Example:**

Multiply 4 by 5.

**Solution:**

If in case the you canâ€™t remember the multiplication table of bigger number, then you can break down the number and then get the product.

** Example:**

Multiply 7 by 6.

**Solution:**

Use the multiplication table of smaller digit.

The product of 7 Ă— 3 is same as the product of 3 Ă— 7.

** Example:**

Multiply 9 by 2.

**Solution:**

If we multiply any number by 10 then we write the number and after that we write one zero.

** Example:**

Multiply 9 by 10.

Multiply 20 by 10.

**Solution:**

Follow the step given below:

**Step 1:**

Multiply the ten digit by the multiplier.

**Step 2:**

Write 1 zero after the product.

** Example:**

Multiply 30 by 6.

**Solution:**

Follow the step given below:

**Step 1:**

Multiply 10 times the ten digits by the multiplier.

**Step 2:**

Multiply the unit digit by the multiplier.

**Step 3:**

Add both the products obtained in the step 1 and step 2.

** Example:**

Multiply 24 by 5.

**Solution:**

**Multiplication Tricks by Numbers**

**Rule for multiplying 1 digit number by 2.****Rule for Multiplying two-digit number by 2:****Rule for multiplying by 4.**

Double the digit to multiply it with 2.

Add the number to itself to make it double.

** Example:**

Multiply 2 by 8.

**Solution:**

From the left, add the digits to itself with carrying.

** Example:**

Multiply 24 by 2.

**Solution:**

Use the concept of double and double to multiply by 4.

** Example:**

Multiply 8 by 4.

**Solution:**