Vocabulary
a number close to the exact number
estimate
79 rounded to the nearest 10
80
124+335=
459
650-200=
450
If Pete studies for 27 minutes on Thursday and 75 minutes on Friday, about how many minutes will he have studied in all?
102 minutes
these symbols show grouping (DO THIS FIRST!)
parentheses ()
189 rounded to the nearest 10
190
473+244=
717
889-124=
765
The number that is 100 less than 9,641.
9,541
this property states that the sum of any number and zero is the number
identity property (of addition)
356 rounded to the nearest 100
400
1,234+3,423=
4,657
2,345-1,234=
1,111
Estimate. Round each addend to the indicated place value. $88 + $27; tens
($90+$30) = $120
this property states that the order in which numbers are added does not change the sum
commutative property (of addition)
7,864 rounded to the nearest 1000
8,000
4,876+2,324=
7,200
6,457-2,367=
4,090
Estimate. Round each addend to the indicated place value. $198 + $147; hundreds
($200+$100) = $300
this property states that the way addends are grouped does not change the sum
associative property (of addition)
Which is greater, 3,264 rounded to the nearest 10 OR 3,264 rounded to the nearest 100?
3,264 rounded to the nearest 100
The sum of two addends is 4,568. What could be the unknown addends?
check team's answer
The difference of a minuend and subtrahend is 4,568. What could be the unknown difference?
check team's answer
Estimate. Round each addend to its greatest place value. 585 + 277=
(600+300) = 900