Lesson 40
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Lesson 40. Using Zero as a Placeholder Circle Graphs. Notes. Mental Math. Links. Activity. Proficiency. Homework. Fact Test. Mental Math. Count up and down by 3’s between 3 and 36. 4 x 75279 + 350 250 - 199$15 + $7.75 Double $1.50800/40 4 x 12, ÷ 6, x 8, - 4, ÷ 6, x 3, ÷ 2.

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Lesson 40

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Lesson 40

Lesson 40

Using Zero as a Placeholder

Circle Graphs


Lesson 40

Notes

Mental Math

Links

Activity

Proficiency

Homework

Fact Test


Mental math

Mental Math

  • Count up and down by 3’s between 3 and 36.

  • 4 x 75279 + 350

  • 250 - 199$15 + $7.75

  • Double $1.50800/40

  • 4 x 12, ÷ 6, x 8, - 4, ÷ 6, x 3, ÷ 2


Lesson 40

  • When subtracting, multiplying, and dividing

  • decimal numbers, we often encounter empty

  • decimal places.

  • Notes

When this occurs, we will fill each empty decimal place with a zero

In order to subtract, it is sometimes necessary

to attach zeros to the top number


Lesson 40

0.5_

-0.32

  • Notes

0.2

X 0.3

_._6

draw x problem


0 5 0 32

0.5 – 0.32

0.5

- 0.32


Circle graphs

Circle Graphs

  • Circle graphs, which are sometimes called pie graphs or pie charts, displays quantitative information in fractions of a circle.


Look at example 5 on page 210

Look at example 5 on page 210

  • Brett collected information from his classmates about their pets. He displayed the information about the number of pets in a circle graph.


Lesson 40

http://www.math.com/school/subject1/lessons/S1U4L6GL.html

http://www.kidsmath.com/e_int.html


Lesson 40

A

1 ½ + ¾ = 2 ¼

20 ¼ - 2 ¼ = 18 inches


Lesson 40

A

1 ½ + ¾ = 2 ¼

20 ¼ - 2 ¼ = 18 inches


Activity

Activity

A dot cube has six faces. Where two faces meet, there is an edge. How many edges does a dot cube have?


Lesson 40

Lesson 59

Practice A-F

Complete #’s 1-10

Fact test G


2 x 3

5

0

:3

0

.2 x .3 =

  • .006

  • .06

  • .6

  • 6

  • None of the above


Lesson 40

5

0

:3

0

.4 - .32 =

  • .28

  • .32

  • .08

  • .38

  • None of the above


12 x 4

5

0

:3

0

.12 x .4 =

  • .048

  • .48

  • 4.8

  • 48

  • None of the above


12 squared

5

0

:3

0

(.12) squared

  • .24

  • .144

  • 1.44

  • .0144

  • None of the above


In the circle graph in example 5 what percent of the pets are cats

5

0

:3

0

In the circle graph in example 5, what percent of the pets are cats?

  • ¼

  • 75%

  • 25%

  • ¾

  • None of the above


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