Add a multiple of ten

Key notes :

Understanding Multiples of Ten:

  • A multiple of ten is any number that can be divided by ten without a remainder, such as 10, 20, 30, 40, etc.
  • Explain that when we add a multiple of ten, we are adding groups of ten.

Visual Aids:

  • Use visuals like ten frames or number lines to illustrate how to add multiples of ten.
  • Show how adding 10, 20, or 30 can be represented visually (e.g., using blocks or drawings).

Example Problems:

Break down the addition step-by-step to show how to combine the numbers.

Demonstrate simple examples:

5+10=15

7+20=27

3+30=33

Learn with an example

✒️Add: 23 + 20 =

  • First, write the problem vertically:
  • 23 + 20
  • Add the ones. Add 3 + 0.
  • 23 + 20= 3
  • Add the tens. Add 2 + 2.
  • 23 + 20 = 43
  • The sum is 43.

✒️Add: 10 + 70 =

  • Notice that both numbers have 1 zero at the end. When the number of zeros is the same, it is easy to add. First, arrange the numbers one above the other:
  • 10 + 70
  • Next, add the zeros. Wherever there is a zero below another zero, place a zero at the bottom. This is because zero plus zero equals zero.
  • 10 + 70 = 0
  • Now add the remaining digits. One plus seven is eight.
  • 10 + 70 = 80

✒️Add: 20 + 24 =

  • First, write the problem vertically:
  • 20 + 24
  • Add the ones. Add 0 + 4.
  • 20 + 24 = 4
  • Add the tens. Add 2 + 2.
  • 20 + 24 = 44
  • The sum is 44.

Let’s practice!