Vocabulary
This mathematical term means the total you get when you add two or more numbers together.
What is a sum?
32 + 25 =
57
45 − 23 =
22
What is the definition of a friendly number?
a number that is easy to work with
Expanded Form 107
This is the result you get when you subtract one number from another.
What is a difference?
23+14 =
37
100-90=
10
How many friendly numbers can we list?
2,5,10,20,50
Start at 24 and jump forward 15 spaces. What number do you land on? What is this strategy called?
Number line 39
If you subtract 25 from 60, this is the answer you get.
What is the difference?
47 + 36 =
83
64 − 38 =
26
You have 48 apples and give away 19 apples. Use a friendly number to help you solve: 48 − 19 = ___.
29
Start at 35 and jump forward 12 spaces. What number do you land on? What is this strategy called?
Number line 47
Mia has 15 stickers, and Ava has 9 stickers. How many more stickers does Mia have than Ava? How do we know what type of problem this is?
What is "How many more". 6 stickers
58 + 27 =
85
52 − 29 =
23
ou have 27 + 19. Use a friendly number to help you solve. What is the sum?
46
(300 + 40 + 5) + (100 + 20 + 3) =
468
A school library received 2,485 new books in September and 3,769 new books in October. The librarian wants to find the sum of the books received during both months. What is the total number of new books the library received? What are the key word in this equation to show me how to solve this question?
Sum, both months, total number
243 + 125 =
368
71 − 39 =
32
Using friendly number solve this equation, 24 + 18 =
42
(400 + 20 + 6) + (100 + 50 + 2) =
578