Adding Whole Numbers
341
+722
______
1,063
Solve:
32 - 11
21
False
Can we do 0 - 1?
No
True or False: When you add, it does not matter which number goes first.
True
Solve:
1,672
+4,857
______
6,529
Fill in the blank.
"More on the floor, go _________ to get ____ more"
next door; 10
Round 451 to the nearest hundred.
500
Solve: 20 - 5
15
If I have to check my subtraction problem with addition, what operation is that called?
Inverse operation
Do we have to regroup? Yes or no?
215
+841
_____
No
2,164 - 1,398 =
766
Estimate the sum for this problem (round to the nearest 1,000):
5,799 ->
+8,128 ->
14,000
400 - 134 =
266
When I want to check my subtraction problem, what two numbers do I use to add?
My difference/answer and the lesser number.
Solve and Check!
9,945
+3,347
______
13,292
67,451
-29,609
_______
37,842
Estimate the difference (round to the nearest 100):
4,169 ->
- 1,727 ->
_______
2,400
6,000 - 4,678
1,322
Sam solve this problem: Explain the mistake she made. What is the correct sum?
638,528
+234,351
________
862,879
872,879... Sam forgot the regroup.
Maria added 45,273 and 35,687 and got a sum of 70,960. Is she correct? If she is not correct, what is the right answer?
No, it is 80,960.
Solve AND Check:
513,363
-382,895
_______
130,468
The diameter of Saturn is 120,536 kilometers. Its widest rings have a diameter of 273,588 kilometers. To the nearest hundred thousand, about how much greater is the diameter of the rings than the diameter of Saturn?
200,000 kilometers
Solve and Check:
30,000
-22,855
______
7,145
1,000,000 - 789,341 = ?
210,659