1. M ULTIPLICATION P ATTERNS S QUARES A REA S QUARE R OOTS BY: Philip Collins Created for Mathese-2D 2007

2. V OCABULARY 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. V OCABULARY C ONTINUED square root--------one of two equal factors of a number. square number--------The product when a whole number is multiplied by itself.

4. M ULTIPLICATION P ATTERNS 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. A RRAYS 6 columns 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 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 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. A REA 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 2354

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 2 3 354 4

14. 20 square cm 1 6 2 7 121113 3 8 54 1514 109 1617182019

15. REVIEW AREA LESSON Area lesson

16. S QUARES AND SQUARE ROOTS A square is a rectangle that has equal sides.

17. 1 2 12 321 2 2 by 2 3 3 by 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 7 2 6 9 3 8 54 9

19. S OLVE THE PROBLEMS Lets Practice square root problems