4th Grade Math!

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4th Grade Math!
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• 105 15
• When comparing numbers, feed the alligator the
  big one! lt

gt
lt

lt
gt

lt
gt
lt

gt
105 gt 15
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• Fractions show part of a whole!

1/8 of the pizza!
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• Some fractions can be equal even if the numbers
  look different!
• 2/4 1/2

Its the same thing!!!

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• The same number can wear many hats!
• 128
• 100208
• One hundred twenty-eight

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Numbers are even or odd!

• 2
• 4
• 6
• 8
• 10
• 12
• 14
• 16
• 18

• 1
• 3
• 5
• 7
• 9
• 11
• 13
• 15
• 17

Even!
Odd!
You can divide these by 2!
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• MULTIPLES

2 x 6 12
2 rows and 6 columns
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• Hooray! Hooray! Sets and Arrays!

4 x 3 12 3 x 4 12 12/3 4 12/4 3

SET!
ARRAY!
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• 12
• X 24

Dont leave anyone out when multiplying!
8
4
0
4
2

2 8 8
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• Multiply gets bigger!

4 . . . 2 times!
4 x 2



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• Divide Break into smaller groups!

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Divided into 3 groups



4 per group 12 / 3 4!
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• Remember your family when dividing!
• Dad divide
• Mom multiply
• Sister subtract
• Brother bring down
• Rover - remainder

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• Estimate educated guess!

If I know this, then I can guess . . .
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• Rounding
• Find your place,
• Look next door,
• Five or greater,
• Add one more!
• 107 - round to the nearest ten

Next door
place
7 is greater than 5 . . . Add one more! 110
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• Patterns
• Can be numbers
• 2,3,5,8,12,17 . . .
• 1,3,5,7,9,11,13 . . .
• Can be shapes

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• Number Sentences/Expressions
• 437

88/11 8
7-25
21/7 3
50 x 2 100
53-17
94 22 72
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• Its the same thing!
• 4x312
• 3x412
• 5x315
• 3x515

You can switch the factors in multiplication and
still get the same answer!
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Graphs
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Tables
X Y







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• Parallel Lines
• Perpendicular lines

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• Cone
• Rectangular Prism
• Triangular Pyramid
• Rectangular Pyramid
• Cube
• Cylinder

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• Reflection flip

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Translation slide
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Rotation turn
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Directions

• Never eat soggy waffles!

Right
Left
Forward
Back
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Two in one!
Two shapes can be put together to make a
different shape!
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Symmetry
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Flat on your face!

• A shapes faces are flat!

This shape has 6 faces, you even count the ones
you cant see!
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Perimeter add the edges








Perimeter 28 inches
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Area Multiply length and width








8 in. long
4 in. tall
Area 8 (length) x 4 (width) 32 square inches
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Say What?

• in. inches
• ft. foot/feet
• yd. yard
• m meter
• cm centimeter
• km kilometer
• mm millimeter

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Huh?

• lbs. pounds
• oz. ounces
• c cup
• qt. quart
• gal gallon
• g gram
• kg kilogram

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Measurements

• Door feet
• Football field yards
• Nail or pencil inches
• School to house miles
• glass of water oz.
• Milk jug gallons
• Eye dropper milliliters
• Soda bottle liters
• Quart - oil
• Pint ice cream
• Paper clip oz.
• Baby lbs.
• Elephant tons
• Grams
• Kilograms
• Cup
• kilometers

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What time is it?
60 min. or 1 hr.
5
55
10
15
50
45
20
40
25
35
30
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Line em up!

• 1.42
• .2
• 1.62

When adding or subtracting decimals, be sure to
line up your points!
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Equal Measurements

• 12 inches 1 ft. etc

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Angles

• 0 degrees
• 45 degrees
• 90

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Kinds of angles

• Obtuse
• Right
• Acute

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Dude . . . Know your data lingo!

• Range BIGGEST - smallest
• MOde MOst often
• OUTlier OUT on its own
• Median Middle
• Mean average then /