Groups of ten objects
Groups-of-tens 256
Exercise Name: Groups of ten objects
Math Missions: Early math Math Mission
Types of Problems: 3

The first instance of the Groups of ten objects exercise appears under the Early math Math Mission. This exercise involves intense practice on just the multiples of tens. It reinforces the number of groups of ten that go into making the multiples of ten.

Types of problems

There are three types of problems that show up in this exercise:

  1. Context groups of tens: This problem takes a word problem situation, often a problem with packing, and asks the user to determine how many groups of ten they have with a certain given number. They need to enter the number of groups of ten, and the number of containers or crates they will need in the word problem.

    Context groups of ten

  2. Type groups of ten: This is purely numerical. It asks the users how many groups of ten are in a given multiple of ten.

    Type groups of ten

  3. How many groups of how many: This problem describes two collections that are the same size. The user is then asked to split the first into groups of ten, and the second asks how big they should make a group to attain a certain number of groups.

    how many groups of how many


These problems are straightforward and concentrate on such a narrow collection of numbers that it is easy to get both accuracy badges and speed badges on them.

  1. On the first problem, the size of the "crates" is always ten. Therefore users can just read how many objects they have in the second sentence and that will give users the 1-digit number that will be the answer to both blanks.
  2. On the second problem, the tens digit is the answer to how many groups of ten users need to make the multiple of ten.
  3. On the third problem, the first slot will always be the tens digit of the number users are working with and the second slot is always filled in with ten.
  4. On the third problem, the numbers users can read in the questions just need to be transferred up and down into the slots since the two collections are actually the same size.

Real-life Applications

  1. Knowing how to count is essential for learning algebra and the higher maths, and counting is used for almost everything humans do.
  2. Addition can be used for adding objects, like adding money totals.
  3. Addition is a major fundamental for higher math levels like algebra, calculus, and more.

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