Number Sense: Addition and Subtraction
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| addends | Numbers added together to give a sum. Example: 7 + 5 = 12, 7 and 5 are addends
🗑
|
||||
| sum | The answer when adding two or more addends. Example: 7 + 5 = 12, 12 is the sum
🗑
|
||||
| Commutative (Order) Property of Addition | Numbers can be added in any order and the sum will be the same. Example: 5 + 3 = 3 + 5
🗑
|
||||
| Associative (Grouping) Property of Addition | Numbers can be grouped in any way and the sum will be the same. Example: (3 + 2) + 4 = 3 + (2 + 4)
🗑
|
||||
| Identity (Zero) Property of Addition | The sum of zero and any number is that number. Example: 0 + 4 = 4
🗑
|
||||
| difference | The answer when subtracting two numbers. Example: 7 - 2 = 5, 5 is the difference
🗑
|
||||
| fact family | A group of related facts using the same numbers. Example: 5 + 3 = 8, 3 + 5 = 8, 8 - 3 = 5, and 8 - 5 = 3
🗑
|
||||
| round | Finding a number closest to a specific place value. We use round numbers when we do not use an exact number. Example: 27 rounds to 30
🗑
|
||||
| estimate | To give a number or answer that tells about how many or how much.
🗑
|
||||
| compatible numbers | Numbers that are easy to add, subtact, multiply, or divide mentally.
🗑
|
||||
| equation | A number sentence that uses an equal sign (=) to show that the value to its left is the same as the value to its right. Example: 6 + 5 = 10
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
Third Graders
Popular Math sets