Multiplication Objective Multiply a 2 digit number by

Multiplication Objective: Multiply a 2 -digit number by a 1 -digit number.

Vocabulary • Product The answer to a multiplication problem. • Factor A number that is multiplied by another number to find a product. Ex: 4 x 6 = 24, 4 and 6 are factors of 24 • Multiply - The act of finding the total number of items in a given number of groups when each group contains the same number of items. It is a short cut for addition. • Array An arrangement that shows objects in rows and columns. Example: 3 x 4 = 12 3 *** * 4

Vocabulary continued • Set -a group of items. **** • Times - to multiply. • Multiple - the product of a whole number and any other number Ex: the multiples of 3 are 3, 6, 9, 12, 15.

What multiplication number sentence can we use to represent this set of squares? What word can we use to describe the arrangement of this set? 6 x 4 ------24 6 and 4 are the factors in this problem product

Multiply without regrouping Multiply the numbers in the ones place. Put the 9 in the ones place of the product. 23 x 3 -------9

Multiply without regrouping Multiply the tens place in the top number by the ones place in the bottom number. Put that answer in the tens place of the product. 23 x 3 -------69

Practice Find the product. 12 22 31 42 x 3 36 x 4 88 x 4 124 x 3 126 • Demonstration http: //www. dositey. com/muldiv/mul 1 ml 1. htm • Practice http: //www. dositey. com/muldiv/mul 1 ss 5. htm

Multiplication with regrouping 12 x 8 -------

Multiply the numbers in the ones place. Put the 6 in the ones place of the product. Regroup the 1 to the tens place. 1 12 x 8 ------6

Multiply the tens place in the top number by the ones place in the bottom number. Then you take this number and add the 1. Put that answer in the tens place of the product. 1 12 x 8 ------96

Practice Find the product. 29 12 26 25 x 3 87 x 5 60 x 5 130 x 4 100 • Demonstration w/regrouping http: //www. dositey. com/muldiv/mul 1 ss 5. htm • Practice w/regrouping http: //www. dositey. com/muldiv/mul 1 regss. htm

Review the vocabulary • • Product Multiplier Multiply Factor Set Array Times

TAKS Preparation Sample Questions

Ms. Rodriguez bought 4 bags of cookies. There are 17 cookies in each bag. How many cookies did Ms. Rodriguez buy? 68 cookies 428 cookies 48 cookies 88 cookies

The third grade classes had a Valentines Day party in the cafeteria. There were 25 tables with 7 seats at each table. How many seats were there in all? 1, 435 seats 145 seats 125 seats 175 seats

Maria’s mom made 8 packages of tamales. There are 12 tamales in each package. Which number sentence shows how many tamales Maria’s mom made? 8 x 12 8 + 12 12 - 8 8 x 2

A hexagon has six sides. Miguel drew 7 hexagons. How many sides did he draw? Hexagons 1 2 3 4 Sides 6 12 18 24 6 sides 48 sides 42 sides 7 sides

The table shows how long it takes Alicia to ride her electric scooter. Miles Minutes 2 4 6 15 30 45 If this pattern continues, how many minutes will it take Alicia to ride 10 miles? 60 minutes 80 minutes 10 minutes 75 minutes