# 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.