Basic Subtraction Basic Subtraction
on MathLineon MathLine
MathLine will enrich:MathLine will enrich:
Introductory subtractionIntroductory subtraction
Subtraction Word ProblemsSubtraction Word Problems
Practicing subtractionPracticing subtraction
Memorizing subtraction factsMemorizing subtraction facts
Playing games involving subtractionPlaying games involving subtraction
MinusMinus
Take awayTake away
SubtractSubtract
Less thanLess than
And many moreAnd many more
Keep in mind there are many words Keep in mind there are many words to describe subtraction:to describe subtraction:
No matter what the language is No matter what the language is they all can be done on MathLinethey all can be done on MathLine
Try this word problem…Try this word problem…
If you have 7 rubber balls
and you lose 3,
how many balls do you have left?
Always start any problem by clearing the rings to the right
Count out seven ringsCount out seven rings
Subtraction – Step 1
7 77 - 3 = - 3 =
Take away three ringsTake away three rings
Subtraction – Step 2
7 – 7 – 33 = =
Count out nine ringsCount out nine rings
Subtraction – Step 1
9
99 - 6 = - 6 =
Take away six ringsTake away six rings
Subtraction – Step 2
9 – 9 – 66 = =
3 rings left.3 rings left.
Subtraction – Step 3
9 – 6 =9 – 6 = 3 3
See answer on MathLineSee answer on MathLine
Subtraction – Step 4
9 – 6 =9 – 6 = 3 3
Count out seventeen ringsCount out seventeen rings
Subtraction – Step 1
17 1717 – 8 = – 8 =
Take away eight ringsTake away eight rings
Subtraction – Step 2
17 – 17 – 88 = =
9 rings left.9 rings left.
Subtraction – Step 3
17 – 8 =17 – 8 = 9 9
See answer on MathLineSee answer on MathLine
Subtraction – Step 4
17 – 8 =17 – 8 = 9 9