Add two multiples of ten

Key notes :

Definition of Multiples of Ten:

  • A multiple of ten is any number that can be divided by ten without a remainder.
  • Examples include 10, 20, 30, 40, 50, and so on.

Recognizing Patterns:

  • Multiples of ten always end in a zero (0).
  • They increase by ten each time:
    • 10 → 20 → 30 → 40 → 50, etc.

Adding Multiples of Ten:

  • When adding two multiples of ten, you can focus on the numbers before the zero:
    • Example: 20 + 30
      • Add the numbers: 2 + 3 = 5
      • Add the zero back: 50

Using Visual Aids:

  • Use number lines or counting blocks to visually represent adding multiples of ten.
  • Show groups of ten (e.g., ten blocks) to illustrate the addition.

Examples:

  • 10 + 20 = 30
  • 30 + 40 = 70
  • 50 + 20 = 70
  • 20 + 50 = 70

Learn with an example

📜Add:10 + 50 =

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+50

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+50=0

Now add the remaining digits. One plus five is six.

10+50=60

📜Add:10 + 60 =

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+60

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+60=0

Now add the remaining digits. One plus six is seven.

10+60=70

📜Add:80 + 10 =

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:

80+10

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.

80+10=0

Now add the remaining digits. Eight plus one is nine.

80+10=90

Let’s practice!