Learn on PengiSaxon Math, Intermediate 4Chapter 1: Lessons 1โ€“10, Investigation 1

Lesson 8: Adding Money

In Saxon Math Intermediate 4, Lesson 8 introduces Grade 4 students to adding money amounts using both physical money manipulatives and the standard pencil-and-paper algorithm, where ones digits and tens digits are added separately in columns. Students practice aligning dollar amounts correctly and applying the addition process to real-world word problems involving two-digit money sums. The lesson also reinforces place value understanding by connecting tens and ones to written dollar amounts.

Section 1

๐Ÿ“˜ Adding Money

New Concept

Money manipulatives can be used to model or act out the addition of money amounts.

Whatโ€™s next

Next, youโ€™ll practice adding money amounts using both manipulatives and the standard pencil-and-paper method to master this skill.

Section 2

Adding money amounts

Property

Money manipulatives are a fantastic, hands-on tool for visualizing the addition of money. To find a total, you can model or act out the problem by combining the bills and coins. For example, adding 15 dollars to 24 dollars means grouping the tens and ones separately, resulting in three 10-dollar bills and nine 1-dollar bills for a total of 39 dollars.

Example

  1. Nelson pays 36 dollars and spends another 22 dollars. Combine three 10s and six 1s with two 10s and two 1s for a total of 58 dollars.
  2. A plumber charges 63 dollars for parts and 225 dollars for labor. That's six 10s and three 1s plus twenty-two 10s and five 1s, totaling 288 dollars.

Explanation

Think of it like being a money manager! You gather all the ten-dollar bills into one pile and all the one-dollar bills into another. Counting up your piles gives you the grand total. It's a fun, physical way to see how addition works with cash.

Section 3

Adding with pencil and paper

Property

When adding money using pencil and paper, it is crucial to align the numbers correctly by place value. Begin by adding the digits in the ones place on the far right. Next, move to the tens place and add those digits. Continue this process from right to left for all place values, and don't forget to include the dollar sign in the answer.

Example

  1. To solve for 32 dollars + 7 dollars, align the 2 and 7 in the ones place. Adding them gives 9. Bring down the 3 from the tens place for a total of 39 dollars.
  2. For 14 dollars + 75 dollars, first add the ones place: 4+5=94 + 5 = 9. Then add the tens place: 1+7=81 + 7 = 8. The sum is 89 dollars.

Explanation

It's like building with LEGOs, but with numbers! You have to stack them up neatly, making sure the ones blocks are above other ones blocks. Add each column from right to left, starting from the ones, to build your final answer correctly.

Section 4

Extend a Pattern

Property

This problem-solving strategy involves figuring out the secret rule or sequence in a set of given information. Once you understand the underlying pattern, you can apply that rule to predict what comes next. By finding the hidden relationship between the elements, you can easily complete the series, whether it involves numbers, shapes, or actions in a logical sequence.

Example

  1. For the sequence 12, 15, 18, ..., the pattern is adding 3 each time. The next three numbers are 18+3=2118 + 3 = 21, 21+3=2421 + 3 = 24, and 24+3=2724 + 3 = 27.
  2. In the sequence 28, 35, 42, ..., the clear rule is to add 7. The next three numbers are 42+7=4942 + 7 = 49, 49+7=5649 + 7 = 56, and 56+7=6356 + 7 = 63.

Explanation

Become a pattern detective! Your mission is to find the hidden rule in a puzzle, like 'add 3' or 'skip two circles.' Once you've cracked the code, you can use it to fill in all the missing pieces and solve the mystery before you.

Book overview

Jump across lessons in the current chapter without opening the full course modal.

Continue this chapter

Chapter 1: Lessons 1โ€“10, Investigation 1

  1. Lesson 1

    Lesson 1: Review of Addition

  2. Lesson 2

    Lesson 2: Missing Addends

  3. Lesson 3

    Lesson 3: Sequences

  4. Lesson 4

    Lesson 4: Place Value, Activity Comparing Money Amounts

  5. Lesson 5

    Lesson 5: Ordinal Numbers, Months of the Year

  6. Lesson 6

    Lesson 6: Review of Subtraction

  7. Lesson 7

    Lesson 7: Writing Numbers Through 999

  8. Lesson 8Current

    Lesson 8: Adding Money

  9. Lesson 9

    Lesson 9: Adding with Regrouping

  10. Lesson 10

    Lesson 10: Even and Odd Numbers

  11. Lesson 11

    Lesson 11: Investigation 1 Number Lines, Activity Drawing Number Lines

Lesson overview

Expand to review the lesson summary and core properties.

Expand

Section 1

๐Ÿ“˜ Adding Money

New Concept

Money manipulatives can be used to model or act out the addition of money amounts.

Whatโ€™s next

Next, youโ€™ll practice adding money amounts using both manipulatives and the standard pencil-and-paper method to master this skill.

Section 2

Adding money amounts

Property

Money manipulatives are a fantastic, hands-on tool for visualizing the addition of money. To find a total, you can model or act out the problem by combining the bills and coins. For example, adding 15 dollars to 24 dollars means grouping the tens and ones separately, resulting in three 10-dollar bills and nine 1-dollar bills for a total of 39 dollars.

Example

  1. Nelson pays 36 dollars and spends another 22 dollars. Combine three 10s and six 1s with two 10s and two 1s for a total of 58 dollars.
  2. A plumber charges 63 dollars for parts and 225 dollars for labor. That's six 10s and three 1s plus twenty-two 10s and five 1s, totaling 288 dollars.

Explanation

Think of it like being a money manager! You gather all the ten-dollar bills into one pile and all the one-dollar bills into another. Counting up your piles gives you the grand total. It's a fun, physical way to see how addition works with cash.

Section 3

Adding with pencil and paper

Property

When adding money using pencil and paper, it is crucial to align the numbers correctly by place value. Begin by adding the digits in the ones place on the far right. Next, move to the tens place and add those digits. Continue this process from right to left for all place values, and don't forget to include the dollar sign in the answer.

Example

  1. To solve for 32 dollars + 7 dollars, align the 2 and 7 in the ones place. Adding them gives 9. Bring down the 3 from the tens place for a total of 39 dollars.
  2. For 14 dollars + 75 dollars, first add the ones place: 4+5=94 + 5 = 9. Then add the tens place: 1+7=81 + 7 = 8. The sum is 89 dollars.

Explanation

It's like building with LEGOs, but with numbers! You have to stack them up neatly, making sure the ones blocks are above other ones blocks. Add each column from right to left, starting from the ones, to build your final answer correctly.

Section 4

Extend a Pattern

Property

This problem-solving strategy involves figuring out the secret rule or sequence in a set of given information. Once you understand the underlying pattern, you can apply that rule to predict what comes next. By finding the hidden relationship between the elements, you can easily complete the series, whether it involves numbers, shapes, or actions in a logical sequence.

Example

  1. For the sequence 12, 15, 18, ..., the pattern is adding 3 each time. The next three numbers are 18+3=2118 + 3 = 21, 21+3=2421 + 3 = 24, and 24+3=2724 + 3 = 27.
  2. In the sequence 28, 35, 42, ..., the clear rule is to add 7. The next three numbers are 42+7=4942 + 7 = 49, 49+7=5649 + 7 = 56, and 56+7=6356 + 7 = 63.

Explanation

Become a pattern detective! Your mission is to find the hidden rule in a puzzle, like 'add 3' or 'skip two circles.' Once you've cracked the code, you can use it to fill in all the missing pieces and solve the mystery before you.

Book overview

Jump across lessons in the current chapter without opening the full course modal.

Continue this chapter

Chapter 1: Lessons 1โ€“10, Investigation 1

  1. Lesson 1

    Lesson 1: Review of Addition

  2. Lesson 2

    Lesson 2: Missing Addends

  3. Lesson 3

    Lesson 3: Sequences

  4. Lesson 4

    Lesson 4: Place Value, Activity Comparing Money Amounts

  5. Lesson 5

    Lesson 5: Ordinal Numbers, Months of the Year

  6. Lesson 6

    Lesson 6: Review of Subtraction

  7. Lesson 7

    Lesson 7: Writing Numbers Through 999

  8. Lesson 8Current

    Lesson 8: Adding Money

  9. Lesson 9

    Lesson 9: Adding with Regrouping

  10. Lesson 10

    Lesson 10: Even and Odd Numbers

  11. Lesson 11

    Lesson 11: Investigation 1 Number Lines, Activity Drawing Number Lines