Vocabulary
What is the answer to an addition problem called?
Sum
57 + 22 =
79
93 - 32 =
61
85 - 49 =
36
189 written in expanded form
100 + 80 + 9
What is the answer to a subtraction problem called?
Difference
632 + 661
1,293
645 - 237=
408
342 - 128 =
214
The digit in the thousands place: 16345
6
What is an estimation?
An educated guess. Not the exact answer.
5647 + 854 =
6501
500 - 78
422
5786 - 2964 =
2822
The value of the digit in the hundreds place: 53636
600
What are the strategies used in subtraction?
Standard form, Expanded form, hiding the hundreds place
3965 + 158 =
4123
9022-578=
8444
3285 - 1786 =
1499
5643 rounded to the nearest hundred
5,600
What are the strategies called in addition? (that we focused on)
Standard form, expanded forms, making friendly numbers.
238+ 7642
7880
8000 - 4678=
3322
54384 - 327=
54057
17943 rounded to the nearest ten-thousand
20000