Fiftyfine _ Minute _ Math

This presentation will review different math skills that will help you with every day math problems.Each lesson takes approximately 15 minutes to do.. He has special hints to help make w

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This presentation will review different math skills that will help you with every day math problems.

Each lesson takes approximately 15 minutes to do Almost anyone can find an extra 15 minutes out of his or her day, whether it be during breakfast or right before bed In just under 3 weeks, you can review all the TABE Computation Math sections.

Look for the Professor He has special hints to help make working the math problems faster and easier.

15 Minute Math

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 Decimals

o Lesson 1 – What Are Decimals?

o Lesson 2 – Addition &

Subtraction

o Lesson 3 – Multiplication

o Lesson 4 – Division

 Fractions

o Lesson 5 – What Are Fractions?

o Lesson 6 - Addition &

Subtraction (no whole #s)

o Lesson 7 – Addition &

Subtraction (with whole #s)

o Lesson 8 – Multiplication &

o Lesson 17 – Please Excuse My

Dear Aunt Sally

o Lesson 18 – Order of Operations

with Variables

 Practice Tests

o Lesson 19 – Practice Test #1

o Lesson 20 – Practice Test #2

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15 Minute Math – Decimals

Lesson # 1 – What Are Decimals?

This lesson explains how to read and work with decimals.

coworker how much medicine you need.

“I need two tenths of a gram of insulin.”

Saying numbers correctly can ensure everyone is talking about the same thing.

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 Decimals are numbers that are less than 1 but greater than 0

0 < 0.1 < 1 (0.1 is between 0 and 1, so it is a decimal)

 They appear to the right of the decimal point

whole number decimal

39.1

“39” is the whole number part

“.1” is the decimal part

“Thirty-nine and one tenth”

 “0.1” is the same thing as “.1” “.1” is just

a lazy way of writing the number

15 Minute Math – DecimalsLesson # 1 – What Are Decimals?

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te

n-th ou

sa nd s

th ou

sa nd s

The “3” is in the hundreds column,

so there are “3 hundreds”

If all the other numbers were

a 0, then the number would be 00300.0000, which is 300 (three hundred.)

The “7” is in the hundredths column,

so there are “7 hundredths.”

If every other number were a 0, then the number would be 00000.0700, which is 0.07 (seven hundredths.)

 Remember, decimals have a

“th” at the end of their names

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te nth hu s nd re

dth s

th ou sa

nd th s

 Extra zeroes to the far right of

a decimal don’t change the value, but they do change how you pronounce the number

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Try it yourself

What numbers are these?

Three and two hundredths = 3.02

Forty and two thousandth =

Twelve and twelve hundredths =

Eighty and eighty ten-thousands =

How do you say these numbers?

37.03 = Thirty-seven and three hundredths

9.04 = nine and four hundredths 20.040 = twenty and forty thousands 100.01 = one hundred and one hundredth

A, E, and F are true

End of Lesson

1

Click for answers:

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15 Minute Math – DecimalsLesson # 2 – Addition & Subtraction

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 Line up the decimals points

 Put zeroes in the blank spaces to help you see what you’re adding

 When adding, don’t forget to carry when

numbers add up to more than 10

 When subtracting, don’t forget to borrow if

the top number is smaller than the bottom number

/

15 Minute Math – DecimalsLesson # 2 – Addition & Subtraction

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 All numbers have a decimal point, even if you can’t see it.

For example, $15 can also be written as $15.00

at the end

100 = 100 = 100.00

1 9

15 Minute Math – Decimals Lesson # 2 – Addition & Subtraction

9

/ / / / /

Remember when you’re borrowing,

you can’t borrow from nothing (zero)

Make sure you borrow all the way

over to the first non-zero number you

find.

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Lesson # 2 – Addition & Subtraction

Click for answers:

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15 Minute Math – DecimalsLesson # 3 – Multiplication

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 Don’t worry about the decimal until you’re done multiplying everything

 First multiply, and then count up the places to the right of the decimal point and put the decimal in the answer.

3.51 x 1.4  351

×14

1404

+3510

4914

3 decimal

places

 first, multiply 351 by 4

 then, multiply 351 by 10

 then, add up the numbers

 last, since there are a total of

3 decimal places in the

problem, start from the right

and move the decimal 3

places to the left in the answer (the problem has 3 decimal places and so does the answer)

 4.914

So, 3.51 x 1.4 = 4.914!

15 Minute Math – Decimals Lesson # 3 – Multiplication

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 Remember to only count numbers to the RIGHT of the decimal point.

in the ones place

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 There are some shortcuts you can take if you’re

multiplying by a multiple of 10 Multiples of 10 are things like 10, 100, 1000 and also things like 0.1, 0.01, 0.001, etc.

multiplying by a number between 0 and 1) Then move the decimal point in the direction that will make the number bigger

or smaller

Lesson # 3 – Multiplication

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15 Minute Math – DecimalsLesson # 4 – Division

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15 Minute Math – Decimals Lesson # 4 – Division

 Remind yourself of the steps you need to take when

8 21|172263

8 21|172263 -168

8 21|172263 -168 4

8 21|172263 -168 42

8203 21|172263 -168 42 -42 06

- 0 63 -63 0

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Step 1 - Move the decimal of the divisor (outside the house) as far to the

right as you can

Step 2 - Move the decimal of the dividend (inside the house) by the same

number of spaces

Step 3 - Move the decimal straight up onto the answer line

Step 4 - Divide like normal

Problem

8.91 ÷ ÷

3.3

Steps 1 & 2

 3.3 |8.91  33 |89.1

Step 3

.

 33 |89.1 Step 4 2.7  33 |89.1 - 66

231

- 231

0

 Think of the division sign, | , like a house With all division problems, the first number goes inside the house (the 8.91) and the second goes outside the house (3.3)

 If you forget, think about a problem you know 10 ÷ 2

= 5 You wouldn’t say 10

= 5 You wouldn’t say 10 | 2 To work it out you’d say 2 |

10 (2 goes into 10.)

Lesson # 4 – Division

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8.91 ÷ ÷ 0.0033

Steps 1 & 2

 0.0033 |8.91  33 |89100.

Step 3

.

 33 |89100 Step 4 2700.

 33 |89100 - 66

231

- 231

0

Problem 8.91 ÷ 0.33 Steps 1 & 2  0.33 |8.91  33 |891 Step 3 .

 33 |891 Step 4 27.

 33 |891 - 66

231

- 231

0

Move the decimal 2 places to the right

Move the decimal 2 places to the right Fill in the empty spaces with zeroes

Lesson # 4 – Division

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