Transcript Opening Week Lessons

Opening Week Lessons
A review of elementary concepts
How to Add
09/10/08
How to Add
Standards: None.
Vocabulary:
Addition-
2L
2R
09/10/08
Vocabulary: ADDITION
• The process of uniting two or more numbers
into one sum; represented by the symbol +.
• The numbers added together are known as
addends.
• The answer is known as the sum.
• Other ways you know addition:
–
–
–
–
–
–
Increase
Plus
More
Added to
Total
The sum of
How to Add
09/10/08
How to Add
Standards: None.
Vocabulary:
AdditionObjective:
2L
2R
09/10/08
Objective
• Demonstrate addition of decimals to the
thousandths.
How to Add
09/10/08
How to Add
Standards: None.
Vocabulary:
AdditionObjective:
Notes/ Examples:
2L
2R
09/10/08
How to Add…
Step 1. Set-up by aligning decimals.
Step 2. Starting on right side, begin
operation of corresponding digits.
Step 3. If a sum gives a 2-digit result,
record right digit and carry left one to
next place value. Include the # carried
over in the next column sum.
Step 4. Bring down decimal and
insert commas between every 3
digits.
1 1
3 6 7 .7
+9 8 8 .2
1,3 5 5 . 9
How to Add
09/10/08
How to Add
Standards: None.
Vocabulary:
AdditionObjective:
Notes/ Examples:
Moral of the Story:
2L
2R
09/10/08
The Moral of the Story…
• EVERY number has a decimal, so you’ll always be able
to set-up addition problems. Simply convert to
equivalent decimals.
• For example: 65 plus 125,387
125,387  125,387.0
65  65.0
125,387.0
+
65.0
How to Add & Subtract
Review
09/12/08
How to Subtract
Standards: None.
Vocabulary:
Subtraction-
3L
3R
09/11/08
Vocabulary: SUBTRACTION
• The process of calculating the difference
between two numbers; removing a part from
the whole. Represented by the symbol -.
• The numbers subtracted are known as the
minuend & the subtrahend.
• The answer is known as the difference.
• Other ways you know subtraction:
–
–
–
–
–
–
Minus
Diminished
Take away
Decreased
Less than
How many more?
How to Add & Subtract
Review
09/12/08
How to Subtract
Standards: None.
Vocabulary:
SubtractionObjective:
3L
3R
09/11/08
Objective
• Demonstrate subtraction of decimals to the
thousandths.
How to Add & Subtract
Review
09/12/08
How to Subtract
Standards: None.
Vocabulary:
SubtractionObjective:
Notes/ Examples:
3L
3R
09/11/08
How to Subtract…
Step 1. Set-up by aligning decimals.
Step 2. Starting on right side, begin
operation of corresponding digits.
Step 3. If the top # is smaller than the
bottom # and you cannot subtract,
borrow from place value next door.
Make sure to reduce the # borrowed
from.
Step 4. Bring down decimal and
insert commas between every 3
digits.
7
9 8 5
- 3 6
6 1
15
.7
7 .2
8 .5
How to Add & Subtract
Review
09/12/08
How to Subtract
Standards: None.
Vocabulary:
SubtractionObjective:
Notes/ Examples:
Moral of the Story:
3L
3R
09/11/08
The Moral of the Story…
More on top? No need to stop!
More on the floor? Go next door.
Get one ten. That's ten ones more.
Numbers the same? Zero's the game!
How to Multiply
09/15/08
How to Multiply
Standards: None.
Vocabulary:
Multiplication-
4L
4R
09/15/08
Vocabulary: MULTIPLICATION
• The addition of a number to itself as often as
indicated by another number; symbolized by
a × b, a · b, a ∗ b, or ab.
• The numbers multiplied are known as factors.
• The answer is known as the product.
• Other ways you know multiplication:
–
–
–
–
Times
Of
Multiply by
The product of
How to Multiply
09/15/08
How to Multiply
Standards: None.
Vocabulary:
MultiplicationObjective:
4L
4R
09/15/08
Objectives
• Demonstrate multiplication of whole numbers
up to a 4-digit number by a 2-digit number.
• Demonstrate multiplication of decimals to the
thousandths.
How to Multiply
09/15/08
How to Multiply
Standards: None.
Vocabulary:
MultiplicationObjective:
Notes/ Examples:
4L
4R
09/15/08
How to Multiply…
Step 1. Set-up multiplication problem;
don’t worry about decimal until step 6.
Step 2. Starting on right side, multiply
bottom # by each # in the top row.
Step 3. If a product gives a 2-digit
result, record right digit and carry left
one to the next place value. Make
sure to add # carried over to next
product.
1
1 8 .3
x
7 2
3 6 6
How to Multiply…
Step 4. Use zero as a placeholder.
Step 5. Repeat steps 2 & 3 with next
bottom #. Continue until all digits in
bottom # have been used. Add
products.
Step 6. Incorporate the # of decimal
places in the factors into final answer.
Insert a comma between every 3
digits.
5 2
1 8 .3
x
7 2
3 6 6
+ 1 2 8 1 0
1 3 1 7 6
1,317.6
How to Multiply
09/15/08
How to Multiply
Standards: None.
Vocabulary:
MultiplicationObjective:
Notes/ Examples:
Moral of the Story:
4L
4R
09/15/08
Moral of the Story
• When multiplying decimals, count the number of
decimal places in the factors. Include this many
decimal places in your answer.
How to Divide
09/17/08
How to Divide
Standards: None.
Vocabulary:
Division-
5L
5R
09/17/08
Vocabulary: DIVISION
 Determining how many times one number or quantity
fits into another. Symbolized by a ÷ b, b a , a/b.
 The number being divided is known as the dividend.
 The number doing the dividing is known as the divisor.
 The answer is known as the quotient.
 Other ways you know division:
Divided by
The quotient of
¼ of; ½ of
Ratio
How to Divide
09/17/08
How to Divide
Standards: None.
Vocabulary:
DivisionObjective:
5L
5R
09/17/08
Objectives
• Demonstrate division of whole numbers up to
two-digit divisors.
• Demonstrate division of decimals to the
thousandths as divisors.
How to Divide
09/17/08
How to Divide
Standards: None.
Vocabulary:
DivisionObjective:
Notes/ Examples:
5L
5R
09/17/08
How to Divide…
Step 1. Set up division problem.
Step 2. From left to right, divide
first digit of the dividend
(inside) by the divisor
(outside).
Step 3. Multiply answer by the
divisor (outside) and subtract.
Step 4. Bring down remaining
digit(s) of dividend and repeat
steps 2 & 3.
012
12 1 4 4
-1 2
24
- 24
0
How to Divide…
EXAMPLE # 1
How to Divide…
EXAMPLE # 2
How to Divide…
EXAMPLE # 3
How to Divide
09/17/08
How to Divide
Standards: None.
Vocabulary:
DivisionObjective:
Notes/ Examples:
Moral of the Story:
5L
5R
09/17/08
The Moral of the Story…
Divide
Multiply
Subtract
Bring Down
Repeat