Understanding Subtraction within 1000
What You Already Know: You can subtract two-digit numbers and understand place value with hundreds, tens, and ones!
Part 1: Mental Subtraction with Round Numbers
When we subtract round numbers (like 100, 200, or 50), we can do it in our heads!
Subtracting Hundreds
When you subtract 100, 200, or 300, just subtract from the hundreds place:
- 567 - 100 = 467 (5 hundreds minus 1 hundred = 4 hundreds)
- 834 - 200 = 634 (8 hundreds minus 2 hundreds = 6 hundreds)
- 750 - 300 = 450 (7 hundreds minus 3 hundreds = 4 hundreds)