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Multiplication. Objective : Multiply a 2-digit number by a 1-digit number. 3. Example: 3 x 4 = 12. Vocabulary. Product The answer to a multiplication problem . (producto)

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multiplication

Multiplication

Objective:

Multiply a 2-digit number by a 1-digit number.

slide2

3

Example:3 x 4 = 12

Vocabulary

  • Product The answer to a multiplication problem.(producto)
  • FactorA number that is multiplied by another number to find a product. (factor)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. (multiplicar)
  • ArrayAn arrangement that shows objects in rows and columns. (matriz)

4

vocabulary continued
Vocabulary continued
  • Set -a group of items.(conjunto)
  • Times- to multiply.(por)
  • Multiple-the product of a whole number and any other number

Ex: the multiples of 3 are 3, 6, 9, 12, 15.(multiple)

slide4

What multiplication number sentence can we use to represent this set of squares?

6 x 4 -------

6 and 4 are the factors in this problem

24

product

What word can we use to describe the arrangement of this set?

practice
Practice

Find the product.

12 22 31 42

x 3x 4x 4x 3

  • Demonstration http://www.dositey.com/muldiv/mul1ml1.htm
  • Practice http://www.dositey.com/muldiv/mul1ss5.htm

36 88 124 126

slide7

Multiplythe numbers in the ones place.

1

1 2 x 8 -------

Put the 6 in the ones place of the product.

Regroup the 1 to the tens place.

6

slide8

Multiplythe 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

1 2 x 8 -------

9

6

practice9
Practice

Find the product.

29 12 26 25

x 3x 5x 5x 4

87 60 130 100

  • Demonstration w/regrouping http://www.dositey.com/muldiv/mul1ss5.htm
  • Practice w/regrouping http://www.dositey.com/muldiv/mul1regss.htm
review the vocabulary
Review the vocabulary
  • Product
  • Multiplier
  • Multiply
  • Factor
  • Set
  • Array
  • Times
slide12
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

slide13

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

slide14

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

slide15

A hexagon has six sides. Miguel drew 7 hexagons. How many sides did he draw?

6 sides

48 sides

42 sides

7 sides

slide16

The table shows how long it takes Alicia to ride her electric scooter.

If this pattern continues, how many minutes will it take Alicia to ride 10 miles?

60 minutes

80 minutes

10 minutes

75 minutes