5th Grade Math Packet

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Determine the winner of each boxing match by finding the surface area of each box. The box with the larger surface area is the winner. Write the surface area under each box. All measurements are given in inches. Be sure to show your work.

Remember: Surface area= 2 x [(length x width) + (length x height) + (height x width)]

8

442 sq. in L X W = 77 L x H = 88 H X W = 56

221 1x2=

6

___ sq.in

2

___ sq.in

___ sq.in

18

___ sq.in

___ sq.in

___ sq.in

___ sq.in

Algebra Action!

Value of The Expression

A variable represents the unknown number in the expression or equation.

For example, 4 x t = 12. The letter" t "represents the number which multiplies

by 4 to equal 12.

An expression in math is a sentence containing numbers and the operations. Below are examples of expressions:

2+ 3

17 - 16 + 2

T2X

6

(3 X 5) ? (6 X 2)

y-20

We can find the value of the expression 7 + y by placing the variable with the number.

For example: if y = 5

1. Put 5 in the place of y

7+(u)

1-??

2. Calculate it

7+5 = 12

Find the value of the expressions below. Show your work.

17-h

lfh =4

, - -,_4__+__y__+___7__,,

lfy=8

(12 - b} + 5

If b = 3

'

'

(5 X m} + 1

lfm=6

If p =10

20 + (6xw}

lfw=3

Find The Missing Numerator or Denorninator

You can multiply a fraction with a fraction by multiplying the numerator with the numerator

and the denominator with the denominator.

Example:

X 6 ~numerator

2

4 ~ denominator

= X 6

1X6 = 6

2

4

2x4

8

Write down the missing numerators or denominators in the multiplication equations below.

0 1 X 1 - 1

2

4

-1 X 3

5

7

3

0

1 X 3

0

2

2

4

0 - 8 X 5 - -

9

6

54

0 1 X

7

3

5

15

0- X -7

14

2

8

16

0 -6 X 2

9

~

0X 3 0 4

,, I

"~

-12

36

- 15 16

0 5 X 8

6

-40

60

0 0- X 4 5

28 25

It All Adds Up!

Let's put all your consumer math skills to the test! Each month, Susie stocks up on pet supplies for her dog, Barksalot. See if you can calculate Susie's monthly expenses for June, July, August, and September. Keep your work organized in the space below each problem.

1. In June, Susie buys a dozen cans of Dog's Dinner dog food at $1.89 per can. She also buys two bags of 'Dem Bones dental chews that each cost $12.69, and a new toy for $10.25. She pays sales tax at a rate of 7.25%. What is her total cost for the month of June?

2. In July, the weather is especially hot, so Susie buys a doggie sprinkler toy for $39.95. Barksalot also needs a new collar. The collar costs $8.00. She buys another dozen cans of Dog's Dinner dog food, as well as a new bottle of flea shampoo for $9.99. No prices have changed since June, and the sales tax remains the same. What is the total amount of her expenses in July?

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3. In August, Barksalot needs a haircut. A trip for Barksalot to go to Perfect Pet's doggie day spa costs Susie $79.50. Susie also decides to treat her pooch to a big, tasty bone for $10.50. She buys another dozen cans of Dog's Dinner dog food, only this month, the cans are on sale for 20 percent off the regular price of $1.89 per can. Given that the sales tax rate has stayed the same, how much does Susie spend on pet expenses in August?

4. In September, it's time for Barksalot to get his annual checkup at the vet. Barksalot needs to get his teeth brushed for $50, a rabies booster vaccination for $49, and an anti-flea treatment for $18. Susie has a coupon that gives her a discount of 15 percent off the vaccination. There's no sales tax. What will be the total bill for Barksalot's visit to the vet?

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FORMULAS FOR THE CIRCLE

There are five major measurements for a circle. If we know some of them they can be used to find the

others. The measurements are: Area (A) 1he space that is inside a circle Circumference (C) 1hc distance around a circle Diameter (d) TI1e length of a straight line going through the center of a circle Radius (r) Half the diameter

Pi (n) The ratio of the circle's circumference to its diameter. It is the same number for all circles.

It is an irrational number, meaning the decimals go on infinitely. It can be rounded to 3.14,

The main formulas for finding a circle's measurements are:

A = nr2 C = n d or C = 2nr d = 2r or d = C!n: r = d/2 or r = (A/n:) 7t = Cid = 3.14 ...

Pi (n) = 3.14

Radius

Area (A) is the space inside the circle.

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PROBLEMS

Find the radius, circumference and area of this circle. Round your answers to the nearest hun dredth.

Find the radius, diameter and area of this circle. Round your answers to the nearest hun dredth.

\D II

--0

C ~ 20

Find the radius, diameter and circumference of this circle. Round your answers to the nearest hundredth.

c ................
................

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