Download presentation

Presentation is loading. Please wait.

Published byMercy Woods Modified over 7 years ago

2
Everyday Mathematics Column Addition

3
Column Addition Column addition involves: Recording numbers in place-value columns; Adding in place-value columns; and Making and moving groups of 1s, 10s, 100s, and so on. Everyday Mathematics

4
Column Addition Solve: 379 + 562 We set up the problem by writing the numbers in their place-value columns. H = hundreds T = tens O = ones T 379379 +562+562 Everyday Mathematics HO

5
Column Addition Solve: 379 + 562 We add the digits in each column, keeping the sums separate in the place-value columns. It doesn’t matter if we start at the left or at the right. HTO379+562HTO379+562 Everyday Mathematics 81113

6
Column Addition Solve: 379 + 562 We make adjustments so each column has only one digit. This can be done in any order, but it’s most efficient to start with the ones place-value column. HTO 379 +562 81311 Everyday Mathematics

7
Column Addition Solve: 379 + 562 The 11 in the ones column represents 11 ones. Remember: 11 = 10 + 1 Move 10 ones to the tens column as 1 ten. HTO 379 +562 81311 Everyday Mathematics

8
Column Addition Solve: 379 + 562 Now we can rewrite the answer: There are still 8 hundreds. There are 14 tens (13 tens + 1 ten = 14 tens). There is only 1 one left in the ones column. Remember that we moved 10 ones to the tens column as 1 ten. HTOHTO 379379 +562+562 81311 14 Everyday Mathematics 18

9
Column Addition Solve: 379 + 562 Now let’s adjust the tens column. The 14 in the tens column represents 14 tens. 14 tens = 10 tens + 4 tens Remember: 10 tens is 1 hundred. Move 10 tens to the hundreds column as 1 hundred. HTO 379 +562 81311 8141 Everyday Mathematics

10
Column Addition Solve: 379 + 562 Now let’s adjust the tens column. The 14 in the tens column represents 14 tens. 14 tens = 10 tens + 4 tens Remember: 10 tens is 1 hundred. Move 10 tens to the hundreds column as 1 hundred. HTO 379 +562 81311 8141 941 Everyday Mathematics

11
Column Addition Now we can rewrite the answer: There are now 9 hundreds in the hundreds column (8 hundreds + 1 hundred = 9 hundreds). There are only 4 tens left in the tens column. (Remember that we moved 10 tens to the hundreds column.) There is still 1 one in the ones column. Since we now have exactly one digit in each of the place-value columns, our work is done. HTOHTO 379379 +562+562 81311 8141 4 Everyday Mathematics 19

12
Column Addition 379 + 562 = 941 HTO 379 +562 81311 8141 941 Everyday Mathematics

13
Column Addition When children use column addition they practice a variety of skills related to number sense and algebraic reasoning. For example: Writing numbers according to the place value of the digits; Renaming numbers in different ways; and Making 10s and 100s, and moving between place-value columns. Some teachers introduce column addition as a step between children’s invented algorithms and the U.S. traditional addition algorithm. Column addition can be explained with language and representations that make sense in terms of place value. Everyday Mathematics

Similar presentations

© 2023 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google