Khan Academy Wiki

Adding decimals 1 is an exercise that 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 practices adding decimal numbers.

Types of Problems[]

There is one type of problem in this exercise:

  1. Add the numbers: This problem has an addition problem about the sum of two decimal numbers. The user is asked to find the correct answer and put it in the slot.
    Add-dec-one

    Add the numbers

Strategies[]

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.

  1. Using a calculator goes against the spirit of the problem, but can increase speed.
  2. Carrying is necessary on some problems.
  3. These problems specifically have both decimal numbers using the hundredths spot, but nothing smaller.
  4. Mentally, users can practice adding from left to right to increase their chances of getting speed badges in the long run!

Real-life Applications[]

  1. Decimals appear in every-day media to display information to consumers.
  2. Addition is a major fundamental for higher math levels like algebra, calculus, and more.