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Grade 3 - Mathematics
5.3 Kinds of Subtraction

There are four kinds of subtraction:
  • Compare
  • Additive
  • Subset
  • Take away
Compare: Comparing two quantities.
Example: Ages of two people

Additive: Comparing two quantities and addition performed to equate smaller quantity to the larger quantity.
Example: Number of days to be added to a week to reach 30 days.

Subset: A part of the whole quantity.
Example: Number of red balls from a basket containing many balls.

Take away: Finding the difference between the whole and the subset.
Example: Subtracting the number of Sundays from a month.


Directions: Write the kind of subtraction in each case. Also write at least five examples of your own for each kind.
Q 1: Mrs. Coccia is 99 years old and Mrs. Ventura is 108 years old. How much older than Mrs. Coccia is Mrs. Ventura? Name the type of subtraction.
Compare
Take away
Additive
Subset

Q 2: Mrs. Matzik baked 30 cookies. Twenty were shaped like pumpkins, how many were not?Name the type of subtraction.
Take away
Subset
Compare
Additive

Q 3: Jacqueline read 210 minutes and Stephanie read 90 minutes. How much longer did Jacqueline read than Stephanie? Name the type of subtraction.
Take away
Additive
Compare
Subset

Q 4: We ordered 12 crayfish and 4 died. How many are left? Name the type of subtraction.
Compare
Additive
Subset
Take away

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Question 6: This question is available to subscribers only!


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