 Mental Maths Multiplication for Grade 2 | Learning Concepts | ORCHIDS Mental Math

Multiplication Strategies

Let us learn some easy and fast ways of multiplication.

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

Example:

Multiply 4 by 5.

Solution: 3. Multiplication by breaking the number:
4. If in case the you can’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: 5. Multiplication by the smaller number.
6. Use the multiplication table of smaller digit.

The product of 7 × 3 is same as the product of 3 × 7.

Example:

Multiply 9 by 2.

Solution: 7. Multiplication by 10
8. 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: 9. Multiplication of two-digit number which ends with zero by 1-digit.
10. 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: 11. Multiplication of two-digit number by 1-digit.
12. 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:

• Firstly, multiply 20 by 5.
• Secondly, multiply 4 by 5.
• Thirdly, add both the products. Multiplication Tricks by Numbers

1. Rule for multiplying 1 digit number by 2.
2. Double the digit to multiply it with 2.

Add the number to itself to make it double.

Example:

Multiply 2 by 8.

Solution: 3. Rule for Multiplying two-digit number by 2:
4. From the left, add the digits to itself with carrying.

Example:

Multiply 24 by 2.

Solution: 5. Rule for multiplying by 4.
6. Use the concept of double and double to multiply by 4.

Example:

Multiply 8 by 4.

Solution:   • -