MyMathKidK-8 Curriculum

Grade 1 Addition: Sums to 15

Add numbers with sums between 11 and 15

What You'll Learn

Add numbers to get sums from 11 to 15
Use making 10 strategy for teen numbers
Understand that 11 = 10 + 1, 12 = 10 + 2, etc.

📖Going Past 10

Now we are adding numbers that give us more than 10! Numbers like 11, 12, 13, 14, and 15 are called teen numbers.

📖Make a 10 First

For 8 + 5, think: 8 needs 2 more to make 10. Take 2 from the 5, leaving 3. So 8 + 5 = 10 + 3 = 13!

💡

Use your 10-bonds! They make adding past 10 much easier.

⚠️

These problems are harder. Take your time and use the make-a-ten strategy.

Worked examples

Real problems from the practice worksheets, solved one step at a time.

Example 1
6 + 6 = ?
1. 6 needs 4 more to make 10.
2. Split 6 into 4 and 2.
3. 6 + 4 = 10.
4. 10 + 2 = 12.
Answer: 12
Example 2
8 + 6 = ?
1. 8 needs 2 more to make 10.
2. Split 6 into 2 and 4.
3. 8 + 2 = 10.
4. 10 + 4 = 14.
Answer: 14
Example 3
3 + 8 = ?
1. 8 needs 2 more to make 10.
2. Split 3 into 2 and 1.
3. 8 + 2 = 10.
4. 10 + 1 = 11.
Answer: 11

Practice Worksheets

Sums to 15 (Set A)

Practice addition with sums up to 15

Sums to 15 (Set B)

More practice with sums to 15

Sums to 15 (Set C)

Additional drill with sums to 15

Sums to 15 (Set D)

Keep practicing sums to 15

Sums to 15 (Set E)

Master sums to 15