Addition and Subtraction Facts
Solve: 7 + 5 = ___.
12
Solve using any strategy. Show or explain your strategy: 695 − 390 = ___.
305
Find the missing number: 800 − ___ = 561.
Check by adding.
239
Check: 561+239 = 800
Read and solve: Jen reads 24 pages. She reads 38 more pages after school. How many pages did she read in all?
You must have all of the following:
Tape diagram, equation, work, and answer sentence
Tape Diagram: whole is unknown. parts are 24 and 38
24 + 38 = 62
Jen read 62 pages in all.
Solve: 15 − 4 = ___.
11
Solve using any strategy. Show or explain your strategy: 278 + 478 = ___.
756
Find the missing number: ___ = 436 + 323.
Check by subtracting.
759
759 - 323 = 436
In the classroom, there are 45 books on the shelf. The teacher brings in 18 more books. How many books are there in total on the shelf now?
You must have all of the following:
Tape diagram, equation, work, and answer sentence
Tape Diagram: whole: unknown, part: 45 part: 18
equation: 45 + 18 = 63
There are 63 books on the shelf now.
Solve: 13 + 2 = ___.
15
Solve using any strategy: 35 + 27 + 13 + 20 = ___.
95
Find the missing number: 742 − 267 = ___.
Show your check.
475
475 + 267 = 742
Read and solve: 62 students went on a field trip. There were 48 fewer teachers than students. How many teachers went on the trip?
You must have all of the following:
Tape diagram, equation, work, and answer sentence
Tape diagram: whole: 62, part: 48
62 - 48 = 14
14 teachers went on the trip.
Solve: 18 − 9 = ___.
9
Mentally Add or subtract 10 or 100:
What is 742+100=
What is 742-100=
write both answers
842
642
Place-value mental math:
What number do you get if you add 100 to 742?
what number do you get if you subtract 100 from 742?
Write both answers and explain how you know.
842
642
The hundreds place changes.
There were 60 books in the class library. Students borrowed 23 books to read at home. How many books are left in the class library?
You must have all of the following:
Tape diagram, equation, work, and answer sentence
equation: 60 - 23 = 37
There are 37 books left in the class library.
13
Mentally Add or subtract 10 or 100:
What is 586-10=
What is 586+10=
write both answers
576
596
Place-value mental math:
What number do you get if you add 10 to 742?
what number do you get if you subtract 10 from 742?
Write both answers and explain how you know.
752
732
Explain that the tens place changes
Read and solve (two-step thinking): Tim makes 36 cookies. Tim makes 28 fewer cookies than Anna. How many total cookies do Tim and Anna make?
You must have all of the following:
Tape diagram, equation, work, and answer sentence
1st tape diagram: whole: unknown, part: 36 Part: 28
2nd tape diagram: whole: unknown, Part: 64 part: 36
36+28=64
36+64=100