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Multiplication Patterns • Squares • Area • Square Roots

Multiplication Patterns • Squares • Area • Square Roots. BY: Philip Collins Created for Mathese-2D 2007. Vocabulary. Array-------numbers or symbols arranged in row or columns Area---------number of square units needed to cover a surface. Row-------a line in the horizontal

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Multiplication Patterns • Squares • Area • Square Roots

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  1. Multiplication Patterns • Squares • Area • Square Roots BY: Philip Collins Created for Mathese-2D 2007

  2. Vocabulary • Array-------numbers or symbols arranged in row or columns • Area---------number of square units needed to cover a surface. • Row-------a line in the horizontal • Column-------a line in the vertical

  3. Vocabulary Continued • square root--------one of two equal factors of a number. • square number--------The product when a whole number is multiplied by itself.

  4. Multiplication Patterns • One way to think of multiplication patterns is by using an array. • Remember that an array is an arrangement of numbers or symbols in columns or rows.

  5. Arrays • 6 columns X X X X X X X X X X X X 2 rows • This array is a collection of 2 rows and 6 columns

  6. X X X X X X X X X X X X X X X X X X X X How many rows does this array have?__________ How many columns does this array have?_______ How many X’s are in this array?_____

  7. X X X X X X X X X X X X X X X X X X X X • What multiplication problem can we make with this array? • Because we have 4 rows and 5 columns • We make the problem 4 x 5 = 20

  8. Let’s practice • array pattern

  9. Area What would the area if this shape be?

  10. Lets say that each side of a small square is 1 cm.

  11. There are four rows 1 2 3 4

  12. and five columns 1 2 3 4 5

  13. We will multiply 4 and 5. The answer will be written in square units. We are using cm so the answer will be 1 2 3 4 5 2 3 4

  14. 20 square cm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

  15. review area lesson Area lesson

  16. Squares and square roots • A square is a rectangle that has equal sides.

  17. 1 1 3 by 3 2 3 1 2 by 2 2 2 2 3

  18. If a shape is 3 by 3, then we can say that it has a square number of 9. Because 3x3=9. We will write the number under square root sign. It means the square root of. If a problem asks for the square root of 9 then we think of the Problem 3x3. Our answer will be 3. 1 9 2 3 4 5 6 7 8 9

  19. Solve the problems • Lets Practice • square root problems

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