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Big Idea:
Using place value to multiply and divide multi-digit numbers is the main focus of this chapter.
• Students extend their understanding of place value to multiply and divide numbers.
• Students discover that division is the inverse of multiplication.
• Students use estimation to check the reasonableness of an answer.
Common Core State Standards:
- 4.OA.1. Interpret a multiplication equation as a comparison, e.g., interpret 35 = 5 × 7 as a statement that 35 is 5 times as many as 7 and 7 times as many as 5. Represent verbal statements of multiplicative comparisons as multiplication equations.
- 4.OA.2. Multiply or divide to solve word problems involving multiplicative comparison, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem, distinguishing multiplicative comparison from additive comparison.
- 4.OA.3. Solve multistep word problems posed with whole numbers and having whole- number answers using the four operations, including problems in which remainders must be interpreted. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding.
- 4.NBT.1. Recognize that in a multi-digit whole number, a digit in one place represents ten times what it represents in the place to its right.
- 4.NBT.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.
- 4.NBT.6 Find whole-number quotients and remainders with up to four-digit dividends and one-digit divisors, using strategies based on place value, the properties of operations, and/or the relationship between multiplication and division. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models.
Learning Videos:
Background Video for Parents
Khan Academy 2-Digit by 2-Digit Multiplication
Math Antics 2-Digit by 2-Digit Multiplication
Khan Academy Long Division
Math Antics Long Division
Game Suggestions for Chapter 3:
2-Digit by 2-Digit Multiplication Game
2-Digit by 2-Digit Multiplication Game
Long Division Game
Chapter 3 Workbook Files
Download File
Chapter 3 Practice
Reteach
Extra Practice
Enrichment
Chapter Review: