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Understanding moving the decimal
Understanding moving the decimal 256
Description
Exercise Name: Understanding moving the decimal
Math Missions: 5th grade (U.S.) Math Mission, 6th grade (U.S.) Math Mission, Arithmetic essentials Math Mission, Pre-algebra Math Mission, Mathematics I Math Mission
Types of Problems: 1

The Understanding moving the decimal exercise appears under the 5th grade (U.S.) Math Mission, 6th grade (U.S.) Math Mission, Arithmetic essentials Math Mission, Pre-algebra Math Mission and Mathematics I Math Mission. This exercise experiments with understanding how multiplying and dividing by powers of ten moves the decimal.

Types of Problems

There is one type of problem in this exercise:

  1. How many times: This problem asks a question about how many times students would have to multiply or divide a particular number by ten to create another number. The user is expected to figure out the correct number of times are write it in the space provided.
    Umtd1

    How many times

Strategies

This exercise is easy to get accuracy badges because it really boils down to counting. Speed badges are also easy because users never have to go more than a handful of spots to get the number.

  1. The answer will always be an integer.
  2. Just look at the numbers, see how many spots the decimal moved, and answer that number.

Real-life Applications

  1. Decimals appear in every day life to display information to consumers.
  2. Decimals are very common in shopping. Price tags, food labels, and receipts all contain decimals.
  3. At gas pumps, decimals are used to show how much gas is pumped and much it costs per gallon.

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