Grade 2 math worksheet focused on adding whole hundreds to complete a thousand, featuring 16 fill-in-the-blank addition problems.

Let's solve the worksheet step by step. The goal is to find the missing number in each addition problem so that the sum equals 1000.

We are adding whole hundreds (like 100, 200, 300, etc.) to reach 1000.

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🔢 Strategy:

To find the missing number:
> Missing number = 1000 − Given number

We'll apply this for each problem.

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✔ Solutions:

1) $ 700 + \_\_\_\_\_\_ = 1000 $
$ 1000 - 700 = 300 $
→ 300

2) $ \_\_\_\_\_\_ + 900 = 1000 $
$ 1000 - 900 = 100 $
→ 100

3) $ 500 + \_\_\_\_\_\_ = 1000 $
$ 1000 - 500 = 500 $
→ 500

4) $ 300 + \_\_\_\_\_\_ = 1000 $
$ 1000 - 300 = 700 $
→ 700

5) $ 800 + \_\_\_\_\_\_ = 1000 $
$ 1000 - 800 = 200 $
→ 200

6) $ \_\_\_\_\_\_ + 700 = 1000 $
$ 1000 - 700 = 300 $
→ 300

7) $ \_\_\_\_\_\_ + 500 = 1000 $
$ 1000 - 500 = 500 $
→ 500

8) $ 900 + \_\_\_\_\_\_ = 1000 $
$ 1000 - 900 = 100 $
→ 100

9) $ \_\_\_\_\_\_ + 200 = 1000 $
$ 1000 - 200 = 800 $
→ 800

10) $ 100 + \_\_\_\_\_\_ = 1000 $
$ 1000 - 100 = 900 $
→ 900

11) $ \_\_\_\_\_\_ + 800 = 1000 $
$ 1000 - 800 = 200 $
→ 200

12) $ 200 + \_\_\_\_\_\_ = 1000 $
$ 1000 - 200 = 800 $
→ 800

13) $ \_\_\_\_\_\_ + 400 = 1000 $
$ 1000 - 400 = 600 $
→ 600

14) $ 400 + \_\_\_\_\_\_ = 1000 $
$ 1000 - 400 = 600 $
→ 600

15) $ \_\_\_\_\_\_ + 300 = 1000 $
$ 1000 - 300 = 700 $
→ 700

16) $ \_\_\_\_\_\_ + 600 = 1000 $
$ 1000 - 600 = 400 $
→ 400

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✔ Final Answers:

1) 300
2) 100
3) 500
4) 700
5) 200
6) 300
7) 500
8) 100
9) 800
10) 900
11) 200
12) 800
13) 600
14) 600
15) 700
16) 400

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🧠 Explanation:

This worksheet helps students understand how numbers add up to 1000, especially when working with multiples of 100. It reinforces subtraction as the inverse of addition and builds number sense around benchmark numbers like 1000.

For example:
- If you know 700 + ? = 1000, think: "How many more do I need to get from 700 to 1000?" That’s 300.
- Or use subtraction: 1000 – 700 = 300.

This skill is essential for mental math and future work with larger numbers.

Let me know if you'd like a printable version or visual explanation!