# math module 1 lesson 16 use the distributive property to find related multiplication facts

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Math Module 1 Lesson 16

Math Module 1Lesson 16Use the Distributive Property to find related multiplication facts. Multiply by 4 Pattern Sheet2 minutesEndThis sand timer will start on a mouse click anywhere on the slide. The sand will drain from the top section to the lower section and when completed will show the word End.

To change the timings of this timer, you need to enter the animation settings, and change the timings for the Isosceles Triangles. There will be 2 that need changing (to the same amount) one animates the top triangle emptying, whilst the other animates the bottom triangle filling.

When you change the timings these have to entered as a number of seconds.

24 x 7 = Lets skip-count to solve. Skip Count by 4s

48121620244 x 7 = 2828Skip Count By 2s To 20 24681012141618 20Skip Count by 3s to 30 369121518212427 30Skip CountTape Diagram ReviewWrite an addition sentence for this tape diagram:8 + 8 = 16Tape Diagram ReviewWrite a multiplication sentence for this tape diagram:2 x 8 = 16Tape Diagram ReviewWrite a multiplication sentence for this tape diagram:8162 x 8 = 16Problem of the DayMs. Williams seats students in 4 rows of 7when she teaches at Board 1:

XXXXXXXXXXXXXXXXXXXXXXXXXXXX

4 x 7

Use the Commutative Property to show how she seats them when she teaches at Board 2.

Problem of the DayBoard 2:

XXXX XXXXXXXXXXXXXXXXXXXXXXXX

7 rows of 4!7 x 4

Problem of the DayBonus!!!

On Monday 6 students are absent. How many students are in Ms. Williams class on Monday?

4 x 7 = 2828 - 6 = 22

There are 22 students in class on Monday!

Concept Development

Talk to your partner about how to box an array that shows:

(5 x 4) + (1 x 4)

What fact does the whole array represent?

6 x 4Concept Development

Talk to your partner about how to box an array that shows:

(5 x 4) + (2 x 4)

What fact does the whole array represent?

7 x 4Concept Development

Talk to your partner about how to box an array that shows:

(5 x 4) + (4 x 4)

What fact does the whole array represent?

9 x 4Concept DevelopmentWhat math fact did we use to solve all 3 problems?5 X 4

Discuss with your neighbor: Why did we use 5 x 4 to solve all three problems?

Concept DevelopmentAnd the answer is ..

Because 5sare easy to solve!Concept DevelopmentWhat multiplication fact does this array represent?

8 x 4

Use the 5s strategy to solve this problem8 fours5 fours3 foursTrue or False: In 5 x 4 & 3 x 4 the size of the groups is the same.True201232PROBLEM SETThe key is in how YOU look at it!