Adding Multi-Digit Numbers

What is the sum of 2,304 and 128,689

• 134,993

• 130,993

• 132,993

What do we do first in this addition problem?

• Write the numbers in expanded form.

• Add the ones place.

• Write the numbers in standard form.

Once the numbers are in expanded form, now what do we do?

• Start in the hundreds place and add the two numbers in the hundreds place.

  Add 8 + 1.

• Start in the tens place and add the two numbers in the tens place. Add 3 + 2.

• Start from the ones place and add the two numbers in the ones place.

  Add 2 + 3.

After we complete the ones place, what do we add now?

• Add the ones place.

• Add the hundreds place.

• Add the tens place.

After the tens place, what place value do we add now?

• The hundreds place.

• The ones place.

• The tens place.

Add the hundreds place.

• 30

  +20

  50

• 830

  +120

  950

• 800

  +100

  900

The answer to 823 + 123 is.........

• 875

• 900

• 955

Let's try another.

What do we do first ?

• Write the numbers in expanded form.

• Add the ones place.

• Write the numbers in standard form.

Add the hundreds place.

• 400

  +20

  420

• 440

  +320

  760

• 400

  +300

  700

Now that all of the place values have been added, what is our last step?

• Write the number in expanded form.

• Write the number in standard form.

• Write the number in word form.