6 th grade review. whole number operations 1. 4137 + 739 2. 567 +139 3. 5602 +8835 4. 65391 + 87 5....
TRANSCRIPT
6th Grade Review
Whole Number Operations
1. 4137 + 739
2. 567 +139
3. 5602 +8835
4. 65391 + 87
5. 941372 + 128343
1. 4,876
2. 706
3. 14,437
4. 65,478
5. 1,069,715
Whole Number Operations
1. 345
- 278
57
2. 9864
- 671
9193
3. 149856
- 51743
97113
4. 7548362
- 969457
6678905
Can you find the
mistake?
Whole Number Operations
1. 65 x 32
2. 345 x 123
3. 265 x 524
Be Sure To Show All Your Work!!
Solutions To Multiplication Problems:
1. 2,0802. 42,4353. 138,860
Whole Number Operations
1. 9954 ÷ 63
2. 2571 3
3. 48026 ÷ 37
€
÷
1. 1582. 8573. 1298
Powers
A POWER is a way of writing repeated multiplication. The BASE of a power is the factor, and the EXPONENT of a power is the number of times the factor is used.
Power Examples
Your Turn to Try a Few Powers
Real World Apps with Powers
Lesson 1EQ: How do I solve
numerical expressions?
Draw a real world example of an event that must be done in a certain order
Vocabulary
Expression – a collection of numbers and operations
11 – 14 ÷ 2 + 6
PEMDAS
P - parentheses E - exponents M - multiply D - divide A – add S - subtract
11 – 14 ÷ 2 + 6Order of Operations – the rules we follow when simplifying a numerical expression
Order of Operations
Ben Susie
3 + 4 x 2= 7 x 2= 14
3 + 4 x 2= 3 + 8= 11
Which student evaluated the
arithmetic expression correctly?
Simplify the expression.
Using the Order of Operations
3 + 15 ÷ 5
3 + 15 ÷ 5
3 + 3
6
Divide.
Add.
Simplify the expression.
Using the Order of Operations
44 – 14 ÷ 2 · 4 + 6
44 – 14 ÷ 2 · 4 + 6
44 – 7 · 4 + 6
44 – 28 + 6
16 + 6
22
Divide and multiply fromleft to right.
Subtract and add fromleft to right.
Simplify the expression.
Using the Order of Operations
3 + 23 · 5
3 + 23 · 5
3 + 8 · 5
3 + 40
43
Evaluate the power.
Multiply.
Add.
Using the Order of Operations
Simplify the expression.
28 – 21 ÷ 3 · 4 + 5
28 – 21 ÷ 3 · 4 + 5
28 – 7 · 4 + 5
28 – 28 + 5
0 + 5
5
Divide and multiply fromleft to right.
Subtract and add fromleft to right.
When an expression has a set of grouping symbols within a second set of grouping symbols, begin with the innermost set.
Helpful Hint
Simplify the expression.
Using the Order of Operations with Grouping Symbols
42 – (3 · 4) ÷ 6
42 – (3 · 4) ÷ 6
42 – 12 ÷ 6
42 – 2
40
Perform the operation inside the parentheses.
Divide.
Subtract.
Using the Order of Operations with Grouping Symbols
[(26 – 4 · 5) + 6]2
[(26 – 4 · 5) + 6]2
[(26 – 20) + 6]2
[6 + 6]2
122
144
The parentheses are inside the brackets, so perform the operationsinside the parenthesesfirst.
Simplify the expression.
Try this one on your own!
3 + 6 x (5+4) ÷ 3 - 7
Step 1: Parentheses
3 + 6 x (5+4) ÷ 3 – 7
Step 2: Multiply and Divide in order from left to right
3 + 6 x 9 ÷ 3 – 7
3 + 54 ÷ 3 – 7
Step 3: Add and Subtract in order from left to right
3 + 18 - 7
Try another!
150 ÷ (6 +3 x 8) - 5
Step 1: Parentheses
150 ÷ (6 +3 x 8) – 5
Step 2: Division150 ÷ 30 – 5
Step 3: Subtraction5 – 5
Challenge!
Classify each statement as true or false. If the statement is false, insert parentheses to make it true.
false1. 4 5 + 6 = 44( )
2. 24 – 4 2 = 40( ) false
3. 25 ÷ 5 + 6 3 = 23
4. 14 – 22 ÷ 2 = 12
true
true
ApplicationSandy runs 4 miles per day. She ran 5 days during the first week of the month. She ran only 3 days each week for the next 3 weeks. Simplify the expression (5 + 3 · 3) · 4 to find how many miles she ran last month.
Week Days
Week 1 5
Week 2 3
Week 3 3
Week 4 3
(5 + 3 · 3) · 4
(5 + 9) · 4
14 · 4
56 Sandy ran 56 miles last month.
Perform the operations in parentheses first.
Add.
Multiply.
Application*Jill is learning vocabulary words for a test. From the list, she already knew 30 words. She is learning 4 new words a day for 3 days each week. Evaluate how many words will she know at the end of seven weeks.
Day Words
Initially 30
Day 1 4
Day 2 4
Day 3 4
(3 · 4 · 7) + 30
(12 · 7) + 30
84 + 30
114
Perform the operations in parentheses first.
Jill will know 114 words at the end of 7 weeks.
Multiply.
Add.
Application*
Denzel paid a basic fee of $35 per month plus $2
for each phone call beyond his basic plan.
Write an expression and simplify to find how
much Denzel paid for a month with 8 calls
beyond the basic plan.
$51
Simplify each expression.
1. 27 + 56 ÷ 7
2. 9 · 7 – 5
3. (28 – 8) ÷ 4
4. 136 – 102 ÷ 5
5. (9 – 5)3 · (7 + 1)2 ÷ 4
58
35
5
116
1,024
EQ: How can I perform operations with fractions?
Fraction Action Vocabulary
Fraction A number that names a part of a whole and has a numerator and denominator
Simplest form When the numerator and denominator have no common factor other than 1
Numerator The top portion of a fraction
Denominator The bottom portion of a fraction
Least Common Denominator
The least common multiple (LCM) of the denominators of two or more fractions
Greatest Common Factor
The largest number that factors evenly into two or more larger numbers
Fraction Action Vocabulary
Adding Fractions
1. 1/5 + 2/5
2. 7/12 + 1/12
3. 3/26 + 5/26
With Like Denominators!
Adding Fractions
1. 2/3 + 1/5
2. 1/15 + 4/21
3. 2/9 + 3/12
With Different Denominators!
Steps:1. Find the LCD
2. Rename the fractions to have the same LCD
3. Add the numerators
4. Simplify the fraction
Subtracting Fractions
1. 3/5 - 2/5
2. 7/10 – 2/10
3. 21/24 – 15/24
With Like Denominators!
Subtracting Fractions
1. 2/3 – 4/12
2. 4/6 – 1/15
3. 2/12 – 1/8
With Different Denominators!
Steps:1. Find the LCD
2. Rename the fractions to have the same LCD
3. Subtract the numerators
4. Simplify the fraction
Multiplying Fractions
1. 2/9 x 3/12
2. ½ x 4/8
3. 1/6 x 5/8
Steps:1. Multiply the numerators
2. Multiply the denominators
3. Simplify the fraction
Dividing Fractions
1. 2/10 ÷ 2/12
2. 1/8 ÷ 2/10
3. 1/6 ÷ 3/15
Steps:1. Keep it, change it, flip it!
2. Multiply the numerators
3. Multiply the denominators
4. Simplify the fraction
Fraction Action Vocabulary
Equivalent fractions Fractions that name the same number or are of equal value
Proper fraction Numerator is smaller than the denominator
Improper fraction When the numerator is larger than the numerator
Mixed Number A whole number and a fraction
Changing Improper Fractions to Mixed Numbers
1. 55/9
2. 39/4
3. 77/12
Steps:1. Divide
2. Remember…First come, first serve
Changing Mixed Numbers to Improper Fractions
1.
2.
3.
9
53
Steps:
1. Multiply the whole number by the denominator
2. Add the result to the numerator (that will be your new numerator)
3. The denominator stays the same
2
16
3
25
Operations with Mixed Numbers
1.
2.
9
33*
8
26
Steps:
1. Convert both mixed numbers to an improper fraction
2. Follow the necessary steps for the given operation
3. Simplify6
43
12
77
Equivalent Fractions
1. 3/8 = 375/10002. 18/54 = 23/693. 6/10 = 6000/1000
1. True2. True3. False
Homework: handout
EQ: How do I perform operations with decimals?
Decimals A way to represent fractions EX:
1. Look at the last decimal place…that place value is the denominator of the fraction
2. The numbers to the right of the decimal are the numerator
Place Value
The value of a digit based on its position in a number
Place Value Game
FunBrain - Place Value Puzzler
Ordering Order from least to greatest3.84, 4.4, 4.83, 3.48, 4.38
Order from greatest to least5.71, 5.8, 5.68, 5.79, 5.6
Comparing Decimals:Use <, >, or = to complete the following.
1. 6.5 ____ 6.45
2. 12.4312 _____ 12.43112
3. .6 ____.61
Rounding – “4 or less let it rest 5 or more let it score”1. Round to the nearest one
17.6
2. Nearest thousandth
12.5503
3. Nearest hundredth
2.2959
Decimal Operation ChantDo you know your decimals?Do you know your decimals?
Add or Subtract, line it up, line it up!Add or Subtract, line it up, line it up!
Multiply, Count it out, count it out!Multiply, Count it out, count it out!
Division, step it out!Division, step it out!
Now you know your decimals!Now you know your decimals!
Adding and Subtracting Decimals Just make sure to line up the
decimal points so that all the decimal points are on a vertical line
HINT:
Try some!
156.7 + 23.14 =
57.123 – 14.25 =
Multiplying Decimals
Multiply the numbers like normal
Move the decimal to the right the exact number of place values in the numbers being multiplied
Try One!
45.68 x 3.5=
Dividing Decimals Stranger Story
The stranger moves toward the door, so you move the same amount back
The stranger gets to the door! GET AWAY! Go to the ROOF!
Dividing Decimals
Then, divide like normal
Try these!
16.9 ÷ 6.5
55.318 ÷ 3.4
EQ: How are percents, ratios, and proportions related?
Percent: A ratio that compares a number to
100 Out of 100 Part/whole
Ratio: A comparison of two numbers Part Part
What is the ratio of pink
circles to white
circles?
Proportion: An equation that shows two ratios
are equal
25
15
5
3
56
49
8
7
Convert to a fraction and a percent…
1. .25
2. .003
Convert to a percent and decimal…
1. 3/4
2. 23/50
Convert to a fraction and a decimal…
1. 25%
2. 104%
Sales Tax, Discount & Mark-Up Vocabulary Discount – the amount taken off the price, this is a
savings Sales Tax & Tip– amounts added to the price of a
purchase that are calculated by using a percent of the purchase price.
Sale Price –the price of an item before a discount or mark-up is applied
Mark-up- the increase from the wholesale price to the retail price
Wholesale price – the price the manufacturer charges the store who will sell its item
Retail price - the price the store you buy the item from charges
Sales Tax & Tip Example
Discount Example
Mark-up Example
Practice with discounts, mark-ups, & tax.
EQ: How can I evaluate algebraic expressions?
Card activity
Variable --An unknown quantity
Expression -- A collection of numbers,
variables, and symbols NO equal sign!!
10 (x+3) + 2
Simplify -- To reduce to the most basic form Make it simple!
1. 3 + 5 (3*5)
2. 60
12
Find the variable, replace itSimplify the expression
Now your all doneJust remember to…
PLUG IT IN! PLUG IT IN!
Learning Partner Class Work
Lesson 6 Area & Perimeter
EQ: How can I solve mathematical problems that involve finding the area and perimeter of various shapes?
Vocabulary Perimeter – the distance around a figure
Area – the amount of space inside a figure
Circumference – the distance around a circle. The ratio of the circle’s circumference to its diameter is represented by (3.14 or 22/7).
€
Π
Triangle Area Formula
Example
Parallelogram Area Formula
Example
Trapezoid Area Formula
Example
Circumference Formula
Example
Your Turn…
Your Turn