Rounding 101
When do you round up?
When the neighbor is 5 or more.
The answer to a subtraction equation is called the...
difference
What is the 5 worth?
1,005
5
Add:
99 + 26
125
When do you round down?
When the neighbor is 4 or less.
Subtract:
892-238
654
Add:
340 + 237
577
What is the 5 worth?
57
50
Subtract:
992-186
806
What do you put in the place values after the rounded number?
zeros
Subtract:
300-125
175
Add:
425+309
734
What is the 5 worth?
595
500
How much is this worth?
15 tens 15 ones
165
Round to the nearest tens and hundreds:
1, 672
Tens: 1,670
Hundreds: 1, 700
Subtract:
997-226
771
Add:
88 + 127
215
How much is this worth?
6 tens 12 ones
72
Round to the nearest thousand:
6, 399
6,000
Round to the nearest tens and hundreds:
409
Tens: 410
Hundreds: 400
Subtract:
2,965-306
2, 659
Add:
602 + 139
741
How much is this worth?
4 hundreds, 13 tens
503
How much is this worth?
22 hundreds 11 ones
2, 211