Post on 03-Jan-2016
description
Multiplication2 digit x 2 digit
5th Grade Math
CM2 FK2
Learning Objective
I will learn to multiply 2 digit x 2 digit numbers
30 x 45
51 x 19
Steps to use Box Method of Multiplication
STEP 1 Break up the numbers (Write each number in expanded
form)
STEP 2 Draw the box
STEP 3 Place numbers on the box
STEP 4 Multiply all of the numbers
STEP 5 Add up all of the products
Example #1
42 x 3240
30
2
+
1200
80
+
Answer: 1,344
You can be a multiplication master young grasshopper!
2
4
60
Example #2
83 x 5680
50
6
+
4000
480
+
Answer: 4648
Be one with the numbers… use expanded form
3
18
150
Example #3
98 x 4590
40
5
+
3600
450
+
Answer: 4,410
8
320
40
Example #4
34 x 9930
90
9
+
360
36
+
Answer: 3,366
The only weapon I need is my BRAIN! HI-YAH!
4
2700
270
Have you mastered multiplying 2 digits x 2 digits?
Solve each problem to prove you are a multiplication ninja (1 digit x 2 digit)
A. 65 x 48 =
B. 72 x 72=
C. 93 x 43=
Use your calculator after you find your answer to check your answer
3,120
5,184
3,999
Solve and follow the directions:
Solve 45 x 97
Answer: 4,365If the product is less than 4,00 stand near the door
If the product is an even number stand near the carpet
If the product is greater than 4,000 but less than 5,000 sit on the floor near the computers
Solve and follow the directions:
Solve 78 x 41
Answer: 3,198If the product is more than 4,00 but less than 4,300 stand near the computers
If the product is an even number sit on the carpet
If the product has two 8’s in it sit under your desk
Congratulations!
You’ve mastered 2 digit x 2 digit
multiplication!
Multiplication Master