Subtracting decimals without the standard algorithm 1

The  exercise appears under the 5th grade (U.S.) Math Mission. This exercise practices subtracting tenths, like $$0.8-0.7$$.

Types of Problems
There is one type of problem in this exercise:


 * 1) Subtract the decimals: This problem has an addition problem about the sum of two decimal numbers. The student is asked to find the correct answer and put it in the text box below.Subtracting decimals without the standard algorithm 1.PNG

Strategies
Knowledge of basic subtraction with decimals is needed for success while doing this exercise.
 * 1) This exercise is easy to get accuracy badges and speed badges because there is only one type of problem and it can be done very quickly.
 * 2) Using a calculator goes against the spirit of the problem, but can increase speed.
 * 3) Borrowing is necessary on some problems.

Real-life Applications

 * 1) Decimals appear in every-day media to display information to consumers.