|
Subtraction is a process of finding the difference between two numbers.
In subtracting one number from another, arrange the numbers according to the place values
and carry out the operation column by column from right to left.
|
|
When two or more numbers are to be
subtracted successively, it must be
carried out in steps subtracting two numbers at a time.
There are few steps involved in order to solve
subtraction math word problems.
|
|
Solving Subtraction Math Word Problems |
Step 1 Read the math word problem.
Step 2 Understand the problem – by asking the questions using Polya’s 4 Step Model.
For example: What is given?
What is asked for?
What operation are you going to use?
What operation is needed?
Step 3 Devise a plan
For example: Adding the numbers first, then do the subtraction.
Step 4 Carry out the plan or calculation.
Step 5 Check the solution
Example
A factory produced 250 400 of calculators in January. In February,
it produced 66 000 less than in January.
Find the number of calculators produced by the factory in February.
Step 1: Read the problem.
Step 2: Understand the problem
Given: January -250 400 of calculators were produced.
February – 66 000 less than January were produced.
Find: The number of calculators produced in February.
Step 3: Devise a plan
Use subtraction (-)
Step 4: Carry out the plan
250 400 – 66 000 = ?
250 000
- 66 000
184 400
184 400 of calculators were produced in February.
Step 5: Check the solution
Subtract the number of calculators produced in February from the number of
calculators produced in January.
250 000
- 184 400
66 000
PS: Try to understand the subtraction math word problems by applying Polya’ 4 Step Model
which can find in next few posts.
|
No Comments »
No comments yet.
RSS feed for comments on this post. TrackBack URI
Leave a comment
If you want to leave a feedback to this post or to some other user´s comment, simply fill out the form below.