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

Multiplication Strategies

Let us learn some easy and fast ways of multiplication.

  1. Multiplication by repeated addition:
  2. We can multiply single digit numbers using the concept of repeated addition.

    Example:

    Multiply 4 by 5.

    Solution:

    G2_1_Mental Mul_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:

    G2_2_Mental Mul_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:

    G2_3_Mental Mul_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:

    G2_4_Mental Mul_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:

    G2_5_Mental Mul_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.
    G2_6_Mental Mul_Solution

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:

    G2_7_Mental Mul_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:

    G2_8_Mental Mul_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:

    G2_9_Mental Mul_Solution

G2_10_Mental Mul_Did you know

G2_11_Mental Mul_Mindmap
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