###### subtraction, subtraction games, free subtraction games, subtraction puzzles, subtraction worksheets, math subtraction, subtraction practice, math subtraction practice, subtraction practice online, math subtraction practice online, subtraction games online, math subtraction games online, free math subtraction games online, learn subtraction, subtraction learning, subtraction tips, math subtraction tipssubtraction
 Number Addition Subtraction Multiplication Division Mixed Operation Decimal Fraction Negative Number Percentage Coordinate Time Equation Geometry Word Problems
 (Math Online Home) Math Online Number of Visitors: Site Map

Online Practice
Number
Subtraction
Multiplication
Division
Mixed Operation
Decimal
Fraction
Negative Number
Percentage
Coordinate
Time
Equation
Geometry
Word Problems

# Subtraction

## Tips for Subtraction

The first tips for subtraction is to count backwards if you are subtracting 1, 2 or 3, but after that, use your addition facts. Number families help you grasp this concept:

8 + 5 = 13
13 - 8 = 5
13 - 5 = 8

The second is to addition off the doubles, that helps

18 - 9 = ?

Using the doubles, kids will know that 9 + 9 = 18 and can fill in the blank.

The third is finger counting. When subtracting 15 - 8, students must ask themselves "Open or closed?" With subtraction it is closed. The put their hand in a fist and their palms will say the smallest number ("8"). They will count up to the higher number, which is 15. When they reach 15, they count how many fingers are standing to get their answer.

The last is to use two-Digit subtraction with regrouping. It is a good idea to teach kids when to "borrow" in a subtraction problem. The name of the rule is the "BBB Rule". The BBB rule states "When the BIG number is on the BOTTOM, then you BORROW." For example, 25-6, in which 6 is bigger than 5, so you need to borrow.

 Number Addition Subtraction Multiplication Division Mixed Operation Decimal Fraction Negative Number Percentage Coordinate Time Equation Geometry Word Problems
 (Math Online Home) Subtraction (c) EduSoftMax - www.edusoftmax.com