Adding Whole Numbers

1
Adding Whole Numbers
2
Objectives

• 6C1a Students will be able to add whole numbers
  ( use up to three addends with no more than 4
  digits in each addend and whole numbers)

3
Addends

• Definition
• addends- a number to be added
• Example
• 245
• 786
• This problem has two addends

4
Addends

• How many addends are in these problems?
• 527
• 681
• 786
• This problem has three addends
• 183
• 517
• 21
• 5
• This problem has four addends

5
Adding Whole Numbers

• How do we add whole numbers with two or more
  addends?
• 2864
• 345
• 436
• ?

6
Adding Whole Numbers

• One way to solve this problem is to use the
  associative property.
• Associative property when adding numbers, the
  grouping of numbers does not affect the result.
• This addition problem could be solved like this
• 2864
• 345
• 436
• Or like this
• 436
• 2864
• 345
• No matter which way you solve the problem you
  will end up with the same sum.

7
Adding Whole Numbers

• The associative property can be used in order to
  find the sum of the numbers. Lets take a closer
  look
• 2864
• 345
• 436
• First add the ones column
• 6410
• 505
• 10515
• Since the answer is 15 we will have to regroup by
  putting the 5 in the ones place and carrying the
  1 to the ten column.

8
Adding Whole Numbers

• Next we move to the tens column
• 1
• 2864
• 345
• 346
• 5
• 6410
• 415
• 10515
• In this case we need to regroup. We will put the
  5 in the tens place and carry the 1.

9
Adding Whole Numbers

• After the tens we move to the hundreds place
• 1
• 2864
• 345
• 436
• 55
• 415
• 8311
• 11516
• Once again we need to regroup. We will put the 6
  in the hundreds place and carry the 1 to the
  thousands place.

10
Adding Whole Numbers

• Now we move to the thousands place
• 1
• 2864
• 345
• 436
• 655
• 213
• Now we put the 3 in the thousands place and we
  have solved the problem.
• 2864
• 345
• 436
• 3655

11
Try This

• 7121
• 321
• 7442
• ones112
• tens224
• hundreds314
• thousands707

12
Try This

• 4562
• 421
• 20
• 5003
• 5813
• 1270
• 532
• 7615

13
Extra Practice

• http//www.eyepleezers.com/aaamath/add.htmtopic30