Unit 6 Contents

Solve the following problems using a mental math strategy or a number line. Be ready to share your strategy.

1. Kim made 39 hats. How many more hats does she need to make to have:
1. 40 hats?
2. 50 hats?
3. 100 hats?
4. 120 hats?
2. Luis's group made 123 hats. How many more hats do they need to make to have:
1. 125 hats?
2. 130 hats?
3. 150 hats?
4. 200 hats?
5. 500 hats?
3. Explain how you solved Question 2D.
4. Add. Look for patterns in each pair of problems.

1. 74 + 10 =

   74 + 8 =

2. 74 + 20 =

   74 + 18 =

3. 74 + 30 =

   74 + 28 =

4. 174 + 10 =

   174 + 8 =

5. 174 + 20 =

   174 + 18 =

5. Describe any patterns you see in the problems in Question 4.
6. Add. Look for patterns in each pair of problems.

1. 57 + 5 =

   57 + 10 =

2. 57 + 15 =

   57 + 20 =

3. 57 + 25 =

   57 + 30 =

4. 157 + 5 =

   157 + 10 =

5. 157 + 15 =

   157 + 20 =