
Math 13.2
Presentation
•
Mathematics
•
2nd Grade
•
Medium
+2
Standards-aligned
Darasani Heath
Used 4+ times
FREE Resource
10 Slides • 6 Questions
1
Math 13.2
2
Learning Intention
I am learning to rewrite subtraction problems given in horizontal form as vertical subtraction algorithm and find the difference.
3
Success Criteria
I can rewrite subtraction problems and find the difference.
4
Materials
Virtual place value chart
paper
pencil
5
Vocabulary
Horizontal-right to left
Vertical- up and down
6
Multiple Choice
DO NOW:
56-28=
35
28
7
Turn and Talk: Breakout Room
Mary adds 45 and 25 and gets 710 for an answer. What error did Mary make?
8
Janet has 54 rocks in her rock garden. She removes 17 rocks.How many rocks does Janet have now?
54-17=? Rewrite the subtraction in the chart. For each number , write the tens in the Tens column. Then write the ones in the ones column.
9
I do:
Step 1: Subtract the ones. Can you take 7 ones from 4 ones?
Step 2: Regroup 5 tens and 4 ones as
4 tens, 14 ones.
14 ones -7 ones = ?
Step 3: Write the number of ones left in the ones place.
Step 4:Subtract the tens. Write the number of tens left in the tens place. 4 tens- 1 ten = ?
Step 5: Write the difference as tens and ones.
10
You do:
There are 57 children in Mr. Gabe’s chorus. 28 of the children are in second grade, and the rest are in third grade. How many children are in third grade?
57-28=?
11
Multiple Choice
Rewrite the subtraction in the chart.
Subtract the ones and be sure to regroup.
Regroup 5 tens 7 ones as?
4 tens , 17 ones
5 tens 17 ones
12
Multiple Choice
What is the number of ones left in the ones place?
17 ones - 8 ones = ?
9 ones
8 ones
13
Multiple Choice
Subtract the tens. Write the number of tens in the tens place.
4 tens - 2 tens = ?
3 tens
2 tens
14
Multiple Choice
Write the difference as tens and ones.
How many children are in third grade?
2 tens, 8 ones
There are 28 students in third grade.
2 tens, 9 ones
There are 29 students in third grade.
15
Exit Ticket
Solve
16
Multiple Choice
Exit ticket: Solve
82 - 56 = ?
82
34
Math 13.2
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