chapter 1 lesson 1-1 objective/ i can… i can… understand whole numbers homework: worksheet 1-1
TRANSCRIPT
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Chapter 1
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Lesson 1-1
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Objective/ I can…
I can… understand whole numbers
Homework: Worksheet 1-1
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New Vocabulary
• Standard form: number form (ex: 1,234)• < “less than”• = “equal”• > “greater than”
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Examples and NotesTrillions Billions Millions Thousands Ones
Hundred Trillions
Ten- Trilions
Trillions
Hundred Billions
Ten Billions
Billions
Hundred Millions
Ten Millions
Millions
Hundred Thousands
Ten Thousands
Thousands
Hundreds
Tens
Ones
Place Value: 151381,862, 394
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Examples and Notes
• Compare:• 8,215 ______ 8,125
• 8,801 ______ 810 ______ 801
• 29,286_____ 29,826 ______ 29,628
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Examples and Notes
• Write in words:• 1,256- • One thousand, two hundred, fifty six.– No “AND”!
• 1,001,001• One million, one thousand, one
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Lesson 1-2
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Objective/ I can…
I can… Estimate with whole numbers
Homework: Worksheet 1-2 and puzzle 1-2
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New Vocabulary
•Compatible numbers:•Numbers that are easy to
compute mentally
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Examples and Notes
• Estimate by rounding (nearest 10 or 100):• 37 + 62 + 48• 40 + 60 + 50 ≈ 150
• 121-82• 120 -80≈ 40
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Examples and Notes• Compatible Numbers (use mainly for x and ÷):• 38÷6 • 36 ÷6 ≈6• 47 ÷8• 48÷8≈6• 29×41• 30×40≈1,200• 2×3,978• 2×4,000 ≈8,000
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Khan Academy Links
• Video: • http://www.khanacademy.org
/math/arithmetic/multiplication-division/v/rounding-whole-numbers-3
• Activities: • http://www.khanacademy.org
/math/arithmetic/decimals/e/rounding_whole_numbers
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Lesson 1-3
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Objective/ I can…
I can… Understand and use the properties of numbers
Homework: Worksheet 1-3
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Khan Academy Links
• Video: • Commutative • Associative• Activities: • Commutative Practice• Associative Practice
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Lesson 1-4
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Objective/ I can…
I can… Apply the order of operations
Homework: Worksheet 1-4 and p 18, #2-30 evens
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New Vocabulary
• Expression: No equal sign ( 3x5x2 )P arenthesesE xponentsM ultiplicationD ivisionA dditionS ubtraction
“Please Excuse My Dear Aunt Sally”
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Examples and Notes
• Find the value of each expression:• 17- 4 x 2
• 34 + 5 x 2 - 17
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Examples and Notes
• Find the value of each expression:• (6+18) ÷ 3 × 2
• (12-9) × (6+1)
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Examples and Notes
• Find the value of each expression:• 200 – (99 ÷ 3) × 2
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Khan Academy Links
• Video: • Order of Operations• Activities: • Order of Operations Practice
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Lesson 1-5
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Objective/ I can…
I can… Read, write and round decimals
Homework: Worksheet 1-5, P.24 #4-32 evens
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New Vocabulary
• Expanded form:• A sum that shows the place value of each
number• Ex: standard form 0.75 • Expanded form 0.7 + 0.05 • Ex: standard form 1.601• Expanded form 1 + 0.6 +
0.001
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Place value (right of the decimal)Hundreds
Ones
. Tenths
hundreths
thousandths
Ten thousandths
Hundred thousandths
Millionths
Ten millionths
Hundred millionths
billionths
Ten Billionths
Hundred billionths
Trillionths
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Examples and Notes
• Ex: 2.65• Read the place value word for the last number• The 5 is in the hundredths place so, • Two and Sixty Five hundredths
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Examples and Notes
• Ex: 13.841• Read the place value word for the last number• The 1 is in the thousandths place so, • Thirteen AND eight hundred for one
thousandths
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Examples and Notes
• Ex: 9.04• Read the place value word for the last number• The 4 is in the hundredths place so, • Nine and four hundedths
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Examples and Notes
• Rounding Decimals– Same as rounding whole numbers
• Underline the place value you’re rounding to.• Look next door, 0-4 to the floor, 5-9 climb the
vine!
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Examples and Notes
• Round to the nearest hundredth• 1.5226
1.5226
• Round to the nearest tenth• 9.0865129
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Khan Academy Links
• Video: • Rounding Decimals• Activities: • Rounding Decimals Practice
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Lesson 1-6
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Objective/ I can…
I can… Compare and Order Decimals
Homework: Worksheet 1-6 and p.29 #2-20 (evens)
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New Vocabulary
• Annex: to add a zero at the end of a decimal number
• Ex: 0.3 (three tenths)• Ex: 0.30 (thirty hundredths)• Does not change the value of the
number (0.3 = 0.30)
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Examples and Notes
• Use a model to compare 0.4 and 0.36
0.4 ________ 0.36
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Examples and Notes
• An easier way… Annex zeros• Order from least to greatest• 0.5• 0.61• 0.07• 0.312• Answer:
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Examples and Notes
• Order from least to greatest• 3.059, 3.64, 3.46 (use annex zeros)
• Answer
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Khan Academy Links
• Video: • Ordering Decimals• Activities: • Ordering Decimals
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Lesson 1-7
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Objective/ I can…
I can… Add and subtract decimals
Homework: Worksheet 1-7 and p.34 #6-26 evens
Show your work!!!
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New Vocabulary
• Front End Estimation: Add the front digits, then estimate the rest.
Ex: 1.791.29
+ 1.49Solve:
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Examples and Notes
• For + and -, LINE UP THE DECIMAL POINTS!• 6.8 + 4.65 + 2.125• Estimate first• Then solve (annex zeros)
• Are they close?
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Examples and Notes
• For + and -, LINE UP THE DECIMAL POINTS!• 3.026 + 14.7 + 1.38• Estimate first• Then solve (annex zeros)
• Are they close?
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Examples and Notes
• Front End estimation• 2.1 +3.4• (whole #s, then decimals, then combine)
• Answer: _________
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Examples and Notes
• Front End estimation• 3.92 + 16.21• (whole #s, then decimals, then combine)
• Answer: ________
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Examples and Notes
• Front End estimation• 16 – 8.79 • (whole #s, then decimals, then combine)• Annex zeros
• Answer:_____
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Khan Academy Links
• Video: • Add Decimals• Subtract Decimals• Activities: • Add Decimals• Subtract Decimals
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Lesson 1-8
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Objective/ I can…
I can… Multiply decimals
Homework: Worksheet 1-8
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Khan Academy Links
• Video: • Multiply Decimals• Activities: • Multiply Decimals Practice
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Lesson 1-9
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Objective/ I can…
I can… Divide decimals
Homework: Worksheet 1-9
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Khan Academy Links
• Video: • Divide Decimals• Activities: • Divide Decimals Practice