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Comparing decimal place value
Comparing-decimal-place-value 256
Description
Exercise Name: Comparing decimal place value
Math Missions: 4th grade (U.S.) Math Mission, 5th grade (U.S.) Math Mission, Arithmetic essentials Math Mission, Pre-algebra Math Mission, Mathematics I Math Mission
Types of Problems: 1

The Comparing decimal place value exercise appears under the 4th grade (U.S.) Math Mission, 5th grade (U.S.) Math Mission, Arithmetic essentials Math Mission, Pre-algebra Math Mission and Mathematics I Math Mission. This exercise helps to clarify the idea of place value in numbers.

Types of Problems

There is one type of problem in this exercise:

  1. Select the answers: This problem has two number with an identical digit in different place values. The user is supposed to answer three questions by selecting the correct option from a drop-down menu.
    Cdpv1

    Select the answers

Strategies

This exercise is easy to get accuracy badges once the user understands what they are asking for. The speed badges are medium-hard to get because the learner has to select options on different questions so the learner has to be fast with the mouse or tabbing.

  1. Find the number that is common and of interest, and count how many spots, this will help the learner get the first two answers.
  2. If the answer was that it was to the "left", then it is {10^{(\text{however many spots})}} larger.
  3. If the answer was that it was to the "right", then it is {\frac{1}{10}^{(\text{however many spots})}} as large.
  4. In other words, left larger, right smaller (fraction).

Real-life Applications

  1. Decimals appear in every-day media 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.
  4. Place value is used for writing checks.
  5. A common example of place value is money (example: $1.69 means that there is 1 whole (dollar), 6 tenths (dimes), and 9 hundredths (pennies)).

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