Subtracting decimals

The topic  is under the 5th Grade Math Mission. This exercise practices subtracting decimal numbers.

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


 * 1) Subtract the numbers: This problem has a subtraction problem about the difference of two decimal numbers. The student is asked to find the correct answer and put it in the slot.Sub-dec.png

Strategies
This exercise is easy to get accuracy and speed badges because there is only one type of problem and it can be done very quickly.
 * 1) Using a calculator goes against the spirit of the problem, but can increase speed.
 * 2) Borrowing is necessary on most of these problems.
 * 3) Subtracting using a distance model can increase speed over the standard algorithms.
 * 4) These problems specifically have both decimal numbers using the tenths, hundredths, or both.