What do we call it when we are adding 51 + 19, but in our heads we think of 51 +20 = 71. 71-extra 1 =70
What is Compensation
300
139 + 72
What is the sum of 211
300
21,538 rounded to the nearest thousand?
What is 22,000
300
700 - 293 =
What is the difference of 407
300
The property that states you can add 2 numbers in any order such as 3 + 5 = the same as 5 + 3
What is The Communitive Property of Addition
300
The estimated difference of 34,516 -495=
What is 34,000
400
6,497 + 835
What is the sum 7,332
400
396,843 rounded to the nearest thousand.
What is 397,000
400
31,425 - 17,683=
What is the difference of 13,742
400
The property that states that when adding 3 or more numbers, you can group them in any order. For example:
5+ (2 + 1) = (5 + 2) +1
What is the Associative Property of Addition.
400
If Jen bought 365 baseball cards and 497 football cards, and Sam has 812 sports cards, what would you need to do first in oder to solve the problem? What is the hidden question?
What is 365 + 497?
500
39,847 + 98,765
What is the sum 138,612
500
957,834 rounded to the nearest hundred thousand?
What is 1,000,000
500
60,301 - 42,138=
What is the difference of 18,163
500
The name of the operation where you check your work by undoing or doing the opposite of what you just did.
Example 51 + 24 = 75 ..to check this do 75 - 24 = 51
What is Inverse Operation
500
Ned says that rounding to the hundreds in the problem 35,287 - 18,934 will give you a more exact answer than rounding to the ten thousands, is Ned correct?