Theme Tasks catalog
Finding the unknown addend
• You will practice choosing neighbor numbers for a given number;
• You will learn how to find the unknown addend and learn to find it;
• You will practice making subtraction equations from addition equations;
• You will improve your skills in calculating addition and subtraction expressions;
• You will strengthen your knowledge about the composition of numbers up to 10.
• You will learn how to find the unknown addend and learn to find it;
• You will practice making subtraction equations from addition equations;
• You will improve your skills in calculating addition and subtraction expressions;
• You will strengthen your knowledge about the composition of numbers up to 10.
1
Drag the missing numbers.
Drag the missing numbers.
2
Drag and drop the correct sign: greater than, less than, or equal to.
Drag and drop the correct sign: greater than, less than, or equal to.
3
Look at the whole and the parts.
Complete the number bonds.
Look at the whole and the parts.
Complete the number bonds.
4
Calculate. Choose the right numbers.
Calculate. Choose the right numbers.
5
Use addition to complete the subtraction sentences.
Find the missing numbers.
Use addition to complete the subtraction sentences.
Find the missing numbers.
6
Look at the equation: 3 plus 2 equals 5.
The numbers 3 and 2 are addends (parts).
The number 5 is the sum (whole).
Addition and subtraction are connected!
We can subtract an addend from the sum to find the other addend:
5 minus 3 equals 2.
Let’s find the missing addends!
Example 1:
4 plus what number equals 6?
Let's subtract the addend from the sum:
6 minus 4 equals 2.
The missing addend is 2.
Example 2:
What number plus 2 equals 6?
Let's subtract the known addend from the sum:
6 minus 2 equals 4.
The missing addend is 4.
Look at the equation: 3 plus 2 equals 5.
The numbers 3 and 2 are addends (parts).
The number 5 is the sum (whole).
Addition and subtraction are connected!
We can subtract an addend from the sum to find the other addend:
5 minus 3 equals 2.
Let’s find the missing addends!
Example 1:
4 plus what number equals 6?
Let's subtract the addend from the sum:
6 minus 4 equals 2.
The missing addend is 2.
Example 2:
What number plus 2 equals 6?
Let's subtract the known addend from the sum:
6 minus 2 equals 4.
The missing addend is 4.
7
Make an equation to find the missing number.
Make an equation to find the missing number.
8
Play domino. Choose the next tiles.
Play domino. Choose the next tiles.
9
Calculate. Choose the right numbers.
Calculate. Choose the right numbers.
10
Count the total cents in each group.
Drag the numbers and signs to make the comparison true.
Count the total cents in each group.
Drag the numbers and signs to make the comparison true.
11
Find the true equations. Select them.
Find the true equations. Select them.
12
Look at the parts.
Find the whole for each group and drag the matching numbers.
Look at the parts.
Find the whole for each group and drag the matching numbers.
