Download GO Math Chapter 3

Chapter 3
Add and Subtract Decimals
Sequence
Term
An ordered list of numbers
Each of the numbers in a sequence
Benchmark
A familiar number used as a point of
reference
To find a number that is close to an
exact amount
To replace a number with one that is
simpler and is approximately the
same size as the original number
Estimate
Round
Hundredth
Tenth
Thousandth
One of one hundred equal parts
One of ten equal parts
One of one thousand equal parts
Show Animated math Module for lesson 3-1
Standard
Form
Word
Form
Expanded
Form
Then complete:
Show What you Know
Vocabulary Builder
Lesson 3-1: Thousandths
Date
Do after p. 105
Test Prep Lesson 3-1:
Use your clicker to answer the following question:
Lesson 3-2: Place Value of Decimals
Date
Test Prep Lesson 3-2:
Use your clicker to answer the following question:
Lesson 3-3: Compare and Order Decimals
Date
Watch animated math module
3 Ways to Compare and Order Decimals
1. Use decimal model (draw a picture)
1. Use a number line
3. Use place value (line decimals up vertically)
Test Prep Lesson 3-3:
Use your clicker to answer the following question:
Lesson 3-4: Round Decimals
Date
Rounding Rules
Step 1
Unerline the digit in the place you want to round
Step 2
If the digit to the right of the underlined number is:
less than 5 keep the underlined number the same
greater than 5 round the underlined number up
Step 3 Drop the digits to the right of the
underlined number
5 or more raise
the score
4 or less let it
rest
Round 0 . 437 to nearest hunderedth
Round 0 . 437 to nearest tenth
Round 11 . 815 to nearest whole number
Round 14 . 603 to nearest hunderedth
Round 14 . 603 to nearest whole number
Round 4.6821 to the nearest:
Whole Number (One)
Tenths
Hunderedths
Thousandths
Test Prep Lesson 3-4:
Use your clicker to answer the following question:
Lesson 3-5: Decimal Addition
Date
Draw a quick picture to add decimals
Add 0.34 + 0.27 = _____
Add 2.5 + 2.8 = _____
Add 1.37 + 1.85 = _____
Test Prep Clicker Question Lesson 3-5:
Lesson 3-6:
Decimal Subtraction
with Base Ten Blocks
Date
0.84 – 0.56=
2.82 – 1. 47 =
3.17 – 0.2 =
Test Prep Clicker Question Lesson 3-6:
Lesson 3-7: Estimate Decimal Sum and Differences
Date
Estimate using
Rounding
Benchmarks
5 or more raise
the score
4 or less let it
rest
0
1.24
0.82
+ 3.4
0.25
0.50
8.78
_ 0.30
0.75
1
Rounding
+
2.08
0.56
0.41
6.17
_ 3.5
3.28
_ 0.86
vs. Benchmark
Test Prep Lesson 3-7:
Use your clicker to answer the following question:
Lesson 3-8: Add Decimals
Date
Step 1: Estimate
Step 2: Vertically line up the place values
Step 3: Add
52.7 + 0.36 =
Test Prep Lesson 3-8:
Use your clicker to answer the following question:
Lesson 3-9: Subtract Decimals
Date
Step 1: Estimate
Step 2: Vertically line up the place values
Step 3: Subtract
5.2 – 3.6 =
13.2 – 8.04 =
Test Prep Lesson 3-9:
Use your clicker to answer the following question:
Lesson 3-10: Patterns with Decimals
Date
Step 1: Look for a pattern is the sequence
increasing or decreasing
Step 2: Write a rule that describes the sequence
Step 3: Extend the sequence to solve the problem
6.70, 5.60, 4.50, _____, 2.30, 1.20
Rule:
2.3,
3.5,
Rule:
4.7,
5.9,
__,
__
Test Prep Clicker Question Lesson 3-10:
Lesson 3-11: Add and Subtract Money
Date
Test Prep Lesson 3-11:
Use your clicker to answer the following question:
Lesson 3-12: Choose a Method
Date
N – 1.15 = 1.10
N + 1.55 = 1.91
14.21 + N + 15.88 = 31.88
Test Prep Lesson 3-12:
Use your clicker to answer the following question: