# 4th grade math videos

### Operations and Algebraic Thinking

**A. ****Use the four operations with whole numbers to solve problems.**

**Multiplication as a Comparison**

4.OA.A.1

Interpret a multiplication equation as a comparison (e.g., interpret 35 = 5 x 7 as a statement that 35 is 5 times as many as 7 and 7 times as many as 5).

Ready Math Lesson 5

**B. ****Gain familiarity with factors and multiples.**

**Multiples**

4.OA.B.4

Recognize that a whole number is a multiple of each of its factors.

Ready Math Lesson 7

**Factors**

4.OA.B.4

Recognize that a whole number is a multiple of each of its factors.

Ready Math Lesson 7

**C. ****Generate and analyze patterns.**

### Number and Operations in Base Ten

**A. ****Generalize place value understanding for multi-digit whole numbers.**

**B. ****Use place value understanding and properties of operations to perform multi-digit arithmetic.**

**Adding with Partial Sums**

4.NBT.B.4

Fluently add and subtract within 1,000,000.

Ready Math Lesson 3

**Multiply 2 digits by 2 digits Using an Area Model**

4.NBT.B.5

Multiply two two-digit numbers, using strategies based on place value and the properties of operations. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models.

Ready Math Lesson 11

**Multiply Multi-Digit Numbers with an Area Model**

4.NBT.B.5

Multiply a whole number of up to four digits by a one-digit whole number, using strategies based on place value and the properties of operations. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models.

Ready Math Lesson 11

**Multiplying Using Partial Products**

4.NBT.B.5

Multiply a whole number of up to four digits by a one-digit whole number and multiply two two-digit numbers, using strategies based on place value and the properties of operations. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models.

Ready Math Lesson 11

**Dividing Using an Area Model**

4.NBT.B.6

Find whole-number quotients and remainders with up to four-digit dividends and one-digit divisors.

Ready Math Lesson 12

**Dividing with Partial Quotients and Partial Products**

4.NBT.B.6

Find whole-number quotients and remainders with up to four-digit dividends and one-digit divisors.

Ready Math Lesson 12

### Number and Operations- Fractions

**A. Extend understanding of fraction equivalence and comparison.**

**Equivalent Fractions with Multiplication**

4.NF.A.1

Explain why a fraction 𝑎 𝑏 is equivalent to a fraction 𝑎 x 𝑛 𝑏 x 𝑛 by using visual fraction models.

Ready Math Lesson 13

**Equivalent Fractions with Division**

4.NF.A.1

Explain why a fraction 𝑎 𝑏 is equivalent to a fraction 𝑎 ÷ 𝑛 𝑏 ÷ 𝑛 by using visual fraction models.

Ready Math Lesson 13

**B. Build fractions from unit fractions by applying and extending previous understandings of operation on whole numbers.**

**Mixed Numbers**

4.NF.B.3b

Decompose a fraction into a sum of fractions with the same denominator in more than one way.

Ready Math Lesson 17

**C. Understand decimal notation for fractions and compare decimal fractions.**

### Measurement and Data

**A. Estimate and solve problems involving measurement.**

**B. Represent and interpret data.**

**C. Geometric measurement, understand concepts of angle and measuring angles.**

### Geometry

**A. Draw and identify lines and angles and classify shapes by properties of their line and angles.**