Subtraction
Lesson
Topic Index | Grade 3 Math | Elementary Test Prep | StudyZone

            300 - 157 =

Step 1
Subtract the ones.
 You can't subtract
0 - 7
So, you must regroup 3 hundreds as 2 hundreds & 10 tens, then regroup
10 tens as 9 tens & 10 ones
10 - 7 = 3

Step 2
Subtract the tens.       
9 tens - 5 tens = 4 tens
 

Step 3
Subtract the hundreds.
2 hundreds - 1 hundred
= 1 hundred

500 - 362 = 

Step 1
Subtract the ones.
 You can't subtract
0 - 2
So, you must regroup 5 hundreds as 4 hundreds & 10 tens, then regroup
10 tens as 9 tens & 10 ones
10 - 2 = 8

Step 2
Subtract the tens.       
9 tens - 6 tens = 3 tens
 

Step 3
Subtract the hundreds.
4 hundreds - 3 hundred
= 1 hundred

Remember