Curriculum Library

Numbers in Base 10 Unit 4: Use Place Value to Add and Subtract

Key Concept: Ones can be added to ones and tens can be added to tens.

Lesson Sequences

T.4-1-1 Add Units of Ones and Tens  |
View Lesson Opener Discover & Discuss (5-10 min)
View Guided Lesson Students apply their understanding of units in order to add like units. (12-20 min)
View Lesson Closer Math Musings (5-8 min)
T.4-1-2 Add Ones or Tens to Two-Digit Numbers  |
View Lesson Opener Hands-On (5-10 min)
View Guided Lesson Students apply their understanding of units in order to add like units within two-digit numbers.  (12-20 min)
View Lesson Closer Math Musings (5-8 min)
T.4-1-3 Add Multiples of 10 to Two-Digit Numbers  |
View Lesson Opener Discover & Discuss (5-10 min)
View Guided Lesson Students add multiples of ten to two-digit numbers.  (12-20 min)
View Lesson Closer Math Musings (5-8 min)
Key Concept: Ones can be subtracted from ones and tens can be subtracted from tens.

Lesson Sequences

T.4-2-1 Subtract Units of Ones and Tens  |
Lesson Plan
View Lesson Opener Discover & Discuss (5-10 min)
View Guided Lesson Students apply their understanding of units in order to subtract like units. (12-20 min)
View Lesson Closer Math Musings (5-8 min)
T.4-2-2 Subtract Ones or Tens from Two-Digit Numbers  |
Lesson Plan
View Lesson Opener Hands-On (5-10 min)
View Guided Lesson Students apply their understanding of units in order to subtract like units within two-digit numbers.  (12-20 min)
View Lesson Closer Math Musings (5-8 min)
T.4-2-3 Subtract Multiples of 10 from Two-Digit Numbers  |
Lesson Plan
View Lesson Opener Discover & Discuss (5-10 min)
View Guided Lesson Students subtract multiples of ten from two-digit numbers.  (12-20 min)
View Lesson Closer Math Musings (5-8 min)
Key Concept: When adding and subtracting like place values are combined. Sometimes it is necessary to compose a ten from ten ones.

Lesson Sequences

T.4-3-1 Add/Subtract Multiples of 10 from Decade Numbers  |
Lesson Plan
View Lesson Opener Discover & Discuss (5-10 min)
View Guided Lesson Students add and subtract multiples of ten from decade numbers.  (12-20 min)
View Lesson Closer Math Musings (5-8 min)
T.4-3-2 Add a One-Digit Number to a Two-Digit Number  |
Lesson Plan
View Lesson Opener Hands-On (5-10 min)
View Guided Lesson Students compose 10 ones into 1 ten when adding.  (12-20 min)
View Lesson Closer Math Musings (5-8 min)
T.4-3-3 Add and Subtract Multiples of 10  |
Lesson Plan
View Lesson Opener Discover & Discuss (5-10 min)
View Guided Lesson Students add and subtract multiples of ten.  (12-20 min)
View Lesson Closer Math Musings (5-8 min)
T.4-3-4 Mentally Add and Subtract Ones or Tens  |
Lesson Plan
View Teacher-Facilitated Lesson Students apply place value strategies to menally add and subtract ones or tens.  (35-45 min)