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Unit 4: Division

Unit 4: Division. Key Vocabulary Everyday Mathematics. 4.1 Division Facts and Extensions. Objective: To review division facts and to extend division facts; and to mentally divide 2-digit numbers by 1-digit numbers. 4.2 The Partial-Quotients Division Algorithm.

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Unit 4: Division

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  1. Unit 4: Division Key Vocabulary Everyday Mathematics

  2. 4.1 Division Facts and Extensions Objective: To review division facts and to extend division facts; and to mentally divide 2-digit numbers by 1-digit numbers

  3. 4.2 The Partial-Quotients Division Algorithm Objective: To review and practice the partial-quotients division algorithm for dividing a whole number by a whole number

  4. Dividend • In a division problem, this is the number being divided 7 127 127 7 127 / 7 Dividend

  5. Divisor • In a division problem, this is the number that the dividend is being divided by 7 127 127 7 127 / 7 Divisor

  6. Quotient • In a division problem, the quotient is the solution or answer. 126 7 = 18 127 / 7 = 18 Quotient

  7. Remainder • In a division problem, any leftover amount that is not divided equally is the remainder 7 127 18 R 1 Remainder

  8. 4.3 American Tour: Finding Distances on a Map Objective: to estimate distances using a map scale

  9. Map Legend / Map Key • A map legend or map key explains the symbols, colors, or markings on the map. • One of the first places to look when examining a map.

  10. Direction Symbol • Locates north, south, east, and west on a map. • If there is no direction symbol, the top of the map is usually understood to be north.

  11. Map Scale • The map scale compares distances on a map with real distances. • The scale can be a ruler-like diagram or words and symbols. • 1 inch represents 100 miles • 1 in. = 100 mi.

  12. Map Legend Map Scale

  13. 4.4 Division of Decimal Numbers Objective: to make a magnitude estimate for quotients; to use the partial-quotients division algorithm to divide decimals by whole numbers

  14. Magnitude Estimate • A rough estimate of the size of the number • Use friendly numbers to make a quick guess • Is the answer in the ones? tens? hundreds? thousands?

  15. 4.5 Interpreting the Remainder Objective: to solve division number stories and interpret remainders within the context of stories.

  16. Variable • A letter used to represent a number 12 x = 4 x = 3 Variable

  17. 4.6 Skills Review with First to 100 Objective: to investigate using a variable to represent a range of values; and to review a variety of mathematical skills

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