Properties
The sum of any number and 0 is the number. This is the __________________ Property.
10,000 more than 78,942
88,942
An __________________ is close to the exact answer.
estimate
When you subtract 4 from 9, the _________ is 5.
difference
The Room 406 River is 3,272 miles long. The DIS River is 2,820 miles long. How much longer is the Room 406 River than the DIS River?
452 miles
Fill in the unknown.
67 + (98+11) = (__ +98) +11
67
100 less than 6,510
6,410
To change the value of a number to one that is easier to work with is to ___________.
round
Find the sum. 349+258+603=
1,210
Alex had $90. He spent $35 on shoes and $40 on a video game. How much money does he have left?
Write the equation with a variable, first. Then solve.
$15
Which property or rule is being used?
78+25=25+78
Commutative Property
360,688 -------> 350,688
10,000 less
Rounded to the nearest thousand, find the estimate of 23,756 and 1,288
25,000
47,707
+ 43,518
91,225
The parade had 356,528 visitors in the first year and 420,982 visitors the next year.
How many more visitors did the zoo have during the first year than the second year?
64,454 visitors
Show an example of the Associative Property.
(6+5)+3 = (5+3)+6
Add. 727 + 83=
810
Rounded to the nearest ten thousand, estimate 678,555 - 56,279=
620,000
2,311
- 1,172
1,139
The bake sale for Angelo’s school recommends that he make 2,000 treats. Yesterday, Angelo made 470 cookies. Today, he made 283 brownies. What's the number of treats Angelo needs to make before this weekend's sale?
Write an equation with a _____ standing for the unknown that can be used to find the number of treats Angelo needs to make before this weekend's sale.
470 + 283 + _____ = 2,000
Give me an example of one of our subtraction rules.
77-77=0
77-0=77
Add. 2,896 + 3,455=
6,351
Eliza completed the addition problem 78,302 + 5,189. She thinks she got the wrong answer, so she wants to check by rounding.
What place should Eliza round to, and what is the estimate that her exact answer should be close to?
Thousands; 83,000
500,000
- 65,340
434,660
The bake sale for Angelo’s school recommends that he make 2,000 treats. Yesterday, Angelo made 470 cookies. Today, he made 283 brownies. What's the number of treats Angelo needs to make before this weekend's sale?
Solve the equation using standard algorithms. Show your work.
1,247 treats