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Using Objects to Divide: Division as Repeated Subtraction

Using Objects to Divide: Division as Repeated Subtraction. You have learned how to use mental math to solve problems. Today we’ll learn how to use repeated subtraction to solve division problems. You will need counters for this lesson!.

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Using Objects to Divide: Division as Repeated Subtraction

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  1. Using Objects to Divide: Division as Repeated Subtraction

  2. You have learned how to use mental math to solve problems. Today we’ll learn how to use repeated subtraction to solve division problems. • You will need counters for this lesson!

  3. How man piles of 5 objects can be made from a group of 10 total objects?

  4. A can of tennis balls holds 3 balls. How many cans are needed to hold 45 tennis balls? • You have learned that there are different interpretations for division. Today, we will use one of those to solve real world division problems.

  5. How many counters are needed for this problem? • How many go in each can?

  6. If you place 3 in one can, how many balls remain? • How did you find this number? • If you can fill another can with 3 balls, how many remain? How can this be continued to find the number of cans needed?

  7. One way of recording the work is by repeatedly subtracting 3. This can be done 15 times so 15 cans are needed.

  8. Can 10 cans be filled? • How many balls are used? • How many remain? • How many cans are needed for the left over balls?

  9. A fully loaded truck holds 2 tons of gravel. How many truckloads are needed to move 26 tons of gravel?

  10. Work on pages 228-229 numbers 1-24 • Then- work on movie madness • Laptops • Pattern center

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