Teacher Guide
Week 7
Adding Within 100 (No Regrouping) — Teacher Guide
Monday: Adding Tens (Mental Math)
1
Add 10
1.
33, 55, 77, 22
2
Multiples of 10
1.
54, 86, 88, 92
3
Number Line
1.
55, 87
4
Number Talk
1.
34+30 is bigger (adds 3 tens vs 2 tens)
2.
56+40 is bigger (adds 4 tens vs 1 ten)
5
Challenge
1.
95, 83
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Tuesday: Adding 2-Digit Numbers
1
Add Ones Then Tens
1.
68, 88, 78, 77
2
Estimation
1.
About 80, actual 90 / About 80, actual 89 / About 70, actual 79
3
Step-by-Step
1.
59, 99
4
Strategies
1.
77, 87, 89, 88
5
Word Problems
1.
57 marbles, 77 books
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Wednesday: Column Addition
1
Column Addition
1.
68, 88, 78, 77
2
More Practice
1.
77, 89, 88, 69
3
Three Addends
1.
99, 99
4
Find Error
1.
68 is correct ✓, 69 is wrong ✗ (should be 79)
5
Create Own
1.
Various: 40+47, 50+37, 60+27, etc.
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Thursday: Word Problems
1
Word Problems
1.
76 shells, 88 books, 87 birds
2
Compare
1.
A=79, B=75, A is bigger
3
Two-Step
1.
57, 77, 77 stickers
4
Create Own
1.
Accept student-created problems
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Friday: Review & Self-Check
1
Mental Math
1.
50, 90, 90, 70, 90, 90
2
Column Review
1.
79, 99, 89, 89
3
Mixed
1.
99, 99, 75, 89
4
Word Problems
1.
49 students, 79 pages
5
Self-Check
1.
Accept student self-assessment and reflection