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Lessons in this unit

Lesson 1

Adding and subtracting 1-digit numbers to/from 3-digit numbers

Lesson 2

Adding multiples of 10 to 3-digit numbers

Lesson 3

Subtracting multiples of 10 from 3-digit numbers

Lesson 4

Adding and subtracting multiples of 100 to/from 3-digit numbers

Lesson 5

Adding two 3-digit numbers (without regrouping)

Lesson 6

Subtracting two 3-digit numbers (without regrouping)

Lesson 7

Applying rounding for estimating (adding)

Lesson 8

Applying rounding for estimating (subtracting)

Lesson 9

Adding two 3-digit numbers (regrouping in one column)

Lesson 10

Adding two 3-digit numbers (regrouping in multiple columns)

Lesson 11

Subtracting 3-digit numbers (regrouping tens to ones)

Lesson 12

Subtracting 3-digit numbers (regrouping hundreds to tens)

Lesson 13

Subtracting 3-digit numbers (regrouping in multiple columns)

Lesson 14

Solving addition and subtraction word problems

Lesson 15

Solving word problems with unknown values