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Addition to 10 - Worksheet 8 - 1st Grade

Hard

Add single-digit numbers with sums to 10 (Hard)

30 problems · 10-15 minutes · Skills: addition, mental math

About This Worksheet

This hard-level worksheet contains 30 problems designed for 1st Grade students practicing addition to 10. Hard worksheets feature challenging problems including multi-step questions, missing values, and real-world applications to push students further.

Fluency with addition facts to 10 is critical. These facts are used constantly in everyday math and form the basis for adding larger numbers.

How to Solve: Worked Example

Example Problem: 6 + ___ = 9
Solution Steps:
  1. Think: what do I add to 6 to get 9?
  2. Count up from 6 to 9: 7, 8, 9 — that's 3 jumps.
  3. 6 + 3 = 9, so the missing number is 3.
Answer: 3
Tip: For missing addend problems, count up from the given number to the total.
1
1 + ___ = 7
2
4 + 5 =
3
5 + 4 =
4
4 + 5 =
5
7 + ___ = 10
6
6 + 2 =
7
8 + ___ = 9
8
1 + ___ = 7
9
5 + 4 =
10
6 + 4 =
11
6 + 4 =
12
3 + 7 =
13
9 + ___ = 10
14
3 + ___ = 8
15
2 + 7 =
16
2 + ___ = 7
17
7 + 2 =
18
5 + 3 =
19
6 + 4 =
20
2 + ___ = 6
21
4 + 4 =
22
3 + 4 =
23
1 + ___ = 10
24
5 + ___ = 10
25
1 + ___ = 9
26
3 + 3 =
27
6 + ___ = 7
28
4 + ___ = 8
29
6 + 2 =
30
3 + 7 =

Answer Key

1. 62. 93. 94. 95. 36. 87. 18. 69. 910. 1011. 1012. 1013. 114. 515. 916. 517. 918. 819. 1020. 421. 822. 723. 924. 525. 826. 627. 128. 429. 830. 10

Frequently Asked Questions

How do I download this addition to 10 - worksheet 8 worksheet?

Click the "Download PDF / Print" button at the top of the worksheet. You can save it as a PDF or print it directly. The answer key will be on a separate page.

How do I find worksheets at different difficulty levels?

Each subtopic has 10 worksheets: Worksheets 1-3 are Easy, 4-7 are Medium, and 8-10 are Hard. Start with Easy worksheets to build confidence, then progress to harder ones.

How many problems are on this worksheet?

This worksheet contains 30 problems. It typically takes 10-15 minutes to complete. An answer key with all solutions is included.