Show:
1
2
3
4
100
Each group has the same number ob objects.
Equal groups.
100
A number of objects counted by 2's. Numbers that end with 0, 2, 4, 6, 8.
Even
100
To join together sets to find the total or sum. The opposite of subtract.
Add
100
On a number line, start at the greatest addend and move forward by the other addend.
Count on
200
Objects displayed in rows and columns.
Array
200
Any numbers being added together.
Addend
200
Addition and subtraction sentences that use the same numbers.
Fact family
200
The answer to an addition problem.
Sum
300
1 left over when counted by 2's. Numbers that end with 1, 3, 5, 7, or 9.
Odd number
300
Two addends that are the same.
Doubles
300
The missing number in a number sentence that makes the number sentence true.
Missing addend
300
Take away, take apart, separate, or find the difference between two sets. The opposite of add.
Subtract
400
Count objects in equal groups of two of more.
Skip count.
400
On a number line, start at the greatest number and move back by the other number.
Count back
400
Addition facts in which one addend is exactly 1 more or 1 less than the other addend.
Near doubles
500
To use the same addend over and over.
Repeated addition.
500
The answer to a subtraction problem.
Difference
500
Basic facts using the same number. Sometimes called a fact family.
Related facts