Vocabulary
When you ______ addends, you break them apart.
Decompose
Whats the standard form of 3,098
3,000+0+90+8
4,673___567
4,673_>__567
The sum of two numbers that are both odd will always be____.
even
Add.
200+700=
900
You can ________ an answer when you do not need an exact answer.
Estimate
553 rounded to the nearest 10 is
550
2,569____2,908
2,569>2,908
The sum of an odd number and an even number will always be_____.
odd
Add.
345+450=
795
When you ______ a number , you find the number that is close to the orignal number.
Round
279+611=611+____
279
5608__5608
5,608=5,608
Subtract.
387-142=
245
Add.
783+217=
1,000
A _________ is a number that is close to a number but is easy to work with.
Compatible number
78+219+34=78+____+34
219
3,877___3,879
3,877<3,879
Subtract.
567-284=
283
Add.
433+319=
752
A representation of a number as a sum of the values of each digit is called _______.
Expanded form
What is the estimated total of 283+237
283=280
237=240
280+240=520
1,000,256____1,000,254
1,000,256>1,000,254
Subtract.
700-532=
168
Add.
1,465+345=
1,810