Math worksheet for practicing addition using the counting up strategy with number lines.

Problem Overview:

The task involves solving addition problems using the Counting Up Strategy and identifying which questions this strategy would work for. Additionally, we need to highlight the largest addend in each question and write the first number we would say when counting up.

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Step 1: Solve the Addition Problems Using the Counting Up Strategy

#### Problem 1: \(3 + 5\)
- Start at 3 on the number line.
- Count up 5 steps: 4, 5, 6, 7, 8.
- Answer: \(3 + 5 = 8\).

#### Problem 2: \(6 + 11\)
- Start at 6 on the number line.
- Count up 11 steps: 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17.
- Answer: \(6 + 11 = 17\).

#### Problem 3: \(7 + 2\)
- Start at 7 on the number line.
- Count up 2 steps: 8, 9.
- Answer: \(7 + 2 = 9\).

#### Problem 4: \(6 + 3\)
- Start at 6 on the number line.
- Count up 3 steps: 7, 8, 9.
- Answer: \(6 + 3 = 9\).

#### Problem 5: \(4 + 12\)
- Start at 4 on the number line.
- Count up 12 steps: 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16.
- Answer: \(4 + 12 = 16\).

#### Problem 6: \(1 + 13\)
- Start at 1 on the number line.
- Count up 13 steps: 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14.
- Answer: \(1 + 13 = 14\).

#### Problem 7: \(5 + 7\)
- Start at 5 on the number line.
- Count up 7 steps: 6, 7, 8, 9, 10, 11, 12.
- Answer: \(5 + 7 = 12\).

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Step 2: Circle All Questions Where the Counting Up Strategy Would Work

The counting up strategy is effective when one of the addends is smaller and can be easily counted from the other addend. This strategy works well for all the given problems because the second addend is relatively small compared to the first addend.

- Circled Questions: All of them (since they are all suitable for counting up).

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Step 3: Highlight the Largest Addend and Write the First Number Said

For each question, identify the largest addend and write the first number you would say when counting up.

#### Question 1: \(5 + 4\)
- Largest addend: 5.
- First number said: 5.

#### Question 2: \(2 + 7\)
- Largest addend: 7.
- First number said: 2.

#### Question 3: \(16 + 5\)
- Largest addend: 16.
- First number said: 16.

#### Question 4: \(14 + 13\)
- Largest addend: 14.
- First number said: 14.

#### Question 5: \(4 + 3\)
- Largest addend: 4.
- First number said: 4.

#### Question 6: \(6 + 2\)
- Largest addend: 6.
- First number said: 6.

#### Question 7: \(8 + 4\)
- Largest addend: 8.
- First number said: 8.

#### Question 8: \(47 + 3\)
- Largest addend: 47.
- First number said: 47.

#### Question 9: \(7 + 35\)
- Largest addend: 35.
- First number said: 7.

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Final Answers:

1. \(3 + 5 = 8\)
2. \(6 + 11 = 17\)
3. \(7 + 2 = 9\)
4. \(6 + 3 = 9\)
5. \(4 + 12 = 16\)
6. \(1 + 13 = 14\)
7. \(5 + 7 = 12\)

Questions where counting up works: All of them.

Largest addends and first numbers said:
- \(5 + 4\): Largest = 5, First = 5
- \(2 + 7\): Largest = 7, First = 2
- \(16 + 5\): Largest = 16, First = 16
- \(14 + 13\): Largest = 14, First = 14
- \(4 + 3\): Largest = 4, First = 4
- \(6 + 2\): Largest = 6, First = 6
- \(8 + 4\): Largest = 8, First = 8
- \(47 + 3\): Largest = 47, First = 47
- \(7 + 35\): Largest = 35, First = 7

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Final Boxed Answer:

\[
\boxed{8, 17, 9, 9, 16, 14, 12}
\]