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Fact Families - Worksheet 10 - 1st Grade

Hard

Understand the relationship between addition and subtraction (Hard)

15 problems · 10-15 minutes · Skills: addition, subtraction, number relationships

About This Worksheet

This hard-level worksheet contains 15 problems designed for 1st Grade students practicing fact families. Hard worksheets feature challenging problems including multi-step questions, missing values, and real-world applications to push students further.

Fact families show that addition and subtraction are two sides of the same coin. This understanding makes both operations easier and faster.

How to Solve: Worked Example

Example Problem: Write all 4 facts for: 4, 7, 11
Solution Steps:
  1. 4 + 7 = 11
  2. 7 + 4 = 11
  3. 11 − 4 = 7
  4. 11 − 7 = 4
Answer: 4+7=11, 7+4=11, 11−4=7, 11−7=4
Tip: Knowing one fact family gives you four facts for free — use them to solve problems faster!
1
Write all 4 facts for: 4, 5, 9
2
Write all 4 facts for: 9, 6, 15
3
Write all 4 facts for: 8, 3, 11
4
Write all 4 facts for: 6, 5, 11
5
Write all 4 facts for: 4, 3, 7
6
Write all 4 facts for: 5, 8, 13
7
Write all 4 facts for: 3, 4, 7
8
Write all 4 facts for: 5, 7, 12
9
Write all 4 facts for: 8, 4, 12
10
Write all 4 facts for: 4, 9, 13
11
Write all 4 facts for: 9, 3, 12
12
Write all 4 facts for: 4, 9, 13
13
Write all 4 facts for: 3, 4, 7
14
Write all 4 facts for: 7, 3, 10
15
Write all 4 facts for: 7, 3, 10

Answer Key

1. 4+5=9, 5+4=9, 9-4=5, 9-5=42. 9+6=15, 6+9=15, 15-9=6, 15-6=93. 8+3=11, 3+8=11, 11-8=3, 11-3=84. 6+5=11, 5+6=11, 11-6=5, 11-5=65. 4+3=7, 3+4=7, 7-4=3, 7-3=46. 5+8=13, 8+5=13, 13-5=8, 13-8=57. 3+4=7, 4+3=7, 7-3=4, 7-4=38. 5+7=12, 7+5=12, 12-5=7, 12-7=59. 8+4=12, 4+8=12, 12-8=4, 12-4=810. 4+9=13, 9+4=13, 13-4=9, 13-9=411. 9+3=12, 3+9=12, 12-9=3, 12-3=912. 4+9=13, 9+4=13, 13-4=9, 13-9=413. 3+4=7, 4+3=7, 7-3=4, 7-4=314. 7+3=10, 3+7=10, 10-7=3, 10-3=715. 7+3=10, 3+7=10, 10-7=3, 10-3=7

Frequently Asked Questions

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