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Chapter 1  Numbers to 1,000
Big Idea: Count, compare, and order numbers to 1,000.
Vocabulary
hundred

10 tens = 100

hundreds

258 = 2 hundreds 5 tens 8 ones

thousand

10 hundreds = 1,000

standard form

258 is the standard form of 258

word form

two hundred fiftyeight is the word form of 258

expanded form

200 + 50 + 8 is the expanded form of 258

greater than (>)

235 > 146

less than (<)

345 < 372

greatest

among 489, 236, and 701, 701 is the greatest

least

among 489, 236, and 701, 236 is the least

more than

1 more than 246 is 247

less than

1 less than 251 is 250


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Chapter 2  Addition Up To 1,000
Big Idea: Threedigit numbers can be added with and without
regrouping.
Vocabulary
add 
put together two or more part to make a whole 
placevalue chart 

regroup 
change 10 ones to 1 ten
or
change 1 ten to 10 ones
change 10 tens to 1 hundred
or
change 1 hundred to 10 tens 

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Extra Practice

Chapter 3  Subtraction Up to 1,000
Big Idea: Subtract up to threedigit numbers with and without
regrouping.
Vocabulary
subtract 
take away one part from the whole to find the other part 
placevalue chart 

regroup 
change 10 ones to 1 ten
or
change 1 ten to 10 ones
change 10 tens to 1 hundred
or
change 1 hundred to 10 tens 

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Extra Practice

Chapter 4  Using Bar Models: Addition and Subtraction
Big Idea: Addition and subtraction can be shown with bar
models.
Bar models are used to show the part, part, and whole of an addition or subtraction problem.
Bar Model Examples:
Vocabulary
join 
bring together two or more sets 
set 
a collection of items 
take away 
remove one part from the whole 
compare 
find out which of two sets has more or fewer things 

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Extra Practice

Chapter 5  Multiplication and Division
Big Idea: Multiplication and division use equal groups
Vocabulary
times 
to multiply 
equal 
having the same amount or number 
group 
a set of things 
multiply 
put all the equal groups together 
repeated addition 
3 + 3 + 3 + 3 = 12
Groups of 3 are added 4 times.
You can use repeated addition to find the number of things in all. 
multiplication sentence 
a number sequence involving multiplication 
multiplication story 
a number story involving multiplication 
share 
put into groups 
divide 
put into equal groups or share equally 
equal groups 
groups or sets that have the same amount 
division sentence 
a number sentence involving division 
repeated subtraction 
6  2  2  2 = 0
Groups of 2 are subtracted 3 times.
You can use repeated subtraction to find the number of groups. 

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Extra Practice

Chapter 6  Multiplication Tables of 2, 5, and 10
Big Idea: Known multiplication facts can be used to find other
multiplication facts
Vocabulary
skipcount 
skipcounting by 2s

dot paper 
this is dot paper.
It shows 3 rows of 2.

related multiplication facts 
5 x 2 = 10
2 x 5 = 10 
odd number 
a number that does not divide exactly by 2
(1, 3, 5, 7, 9) 
even number 
a number that divides exactly by 2
(0, 2, 4, 6, 8) 

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Extra Practice

Chapter 7  Metric Measurement of Length
Big Idea: Centimeter rulers and metersticks can be used to
measure and compare how long and how tall things
are
Vocabulary
meterstick 
a meterlong ruler to measure length 
length 
how long something is 
meter (m) 
a metric unit of length 
unit 
units are used to measure 
width 
how wide something is 
height 
how wides something is 
taller,
tallest


shorter,
shortest


longer,
longest


centimeter (cm)

a metric unit of length, used to measure shorter lengths 

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Extra Practice

Chapter 10  Mental Math and Estimation
Big Idea: Mental math can be used when an exact answer is
needed.
Estimation can be used when an exact answer is not
needed.
Vocabulary
sum 
the result when numbers are added 
add mentally 
adding numbers mentally without actual writing 
difference 
the result when one number is subtracted from another 
subtract mentally 
subtracting numbers mentally without actual writing 
number line 
a line that shows numbers in increasing size from left to right 
about 
an estimation 
round

for example: 44 is 40 when rounded to the nearest ten 
nearest ten

for example: 44 is 40 when rounded to the nearest ten 
estimate

a number close to an exact amount 
reasonable 
when the actual answer is close to an answer from a rounding or estimation 

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Extra Practice

Chapter 11  Money
Big Idea: Money amounts can be shown and counted using
bills and coins
Vocabulary
$1 bill 
a bill with a value of $1 or 100¢ 
$5 bill 
a bill with a value of $5 or 500¢ 
$10 bill 
a bill with a value of $10 or 1,000¢ 
$20 bill 
a bill with a value of $20 or 2,000¢ 
cent sign
¢ 
a sign that indicates that the value of the amount is in cents (not dollars) 
dollar sign
$ 
a sign that indicates that the value of the amount is in dollars (not cents) 
decimal point

a dot that separates the cents from the dollars in money amounts 
table

a table can be used to organize data in rows and columns 

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Extra Practice

Chapter 12  Fractions
Big Idea: Fractions can be used to describe how equal parts
are related to a whole.
Vocabulary
equal 
each part is the same size 
unequal 
not the same size 
whole 
an entire figure and is equal to one 
fraction 
a number that names equal parts of a whole 
onehalf 
one of the parts you get when you divide something into 2 equal parts 
onethird 
one of the parts you get when you divide something into 3 equal parts 
onefourth

one of the parts you get when you divide something into 4 equal parts 
unit fraction

names one of the equal parts of a whole 
same 
figures or objects that are equal in size 
greater than 
more than in value 
less than 
smaller in value 
like fractions 
the bottom numbers are the same 

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Extra Practice

Chapter 13  Customary Measurement of Length
Big Idea: Rulers can be used to measure and compare how
long and how tall things are
Vocabulary
foot/feet (ft.) 
a customary measure of length 
length 
how long something is 
ruler 
a tool used to measure length of an object 
unit 
units are used to measure 
width 
how wide something is 
height 
how wides something is 
longest

a word used when ordering three objects by length 
shortest

a word used when ordering three objects by length 
inch (in.)

a customary measure of length 

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Extra Practice

Chapter 14  Time
Big Idea: Time of day can be shown in different ways.
Vocabulary
hour hand 
short hand on a clock 
minute hand 
long hand on a clock 
minute 
a unit of time
60 minutes equals 1 hour 
hour 
a unit of time equal to 60 minutes 
o'clock 
o'clock means according to the clock 
past 
after 
clock face

on a clock face, the long hand tells the hour and the short hand tells the minutes after the hour 
A.M.

use A.M. to talk about time just after midnight to just before noon 
P.M. 
use P.M. to talk about time just after noon to just before midnight 

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Videos
Extra Practice

Chapter 17  Graphs and Line Plots
Big Idea: Picture graphs, tally charts, bar graphs, and line
plots show data about things you can count
Vocabulary
picture graph 
a graph that uses pictures to represent data 
key 
a statement that tells what each picture or symbol on a picture graph stands for 
symbol 
a picture that represents data in a picture graph 
record 
to keep track of data or information 
tally chart 
a chart that uses tally marks to keep track of data or information collected 
line plot 
a graph that represents data along a number line 

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Read Aloud
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Chapter 18  Lines and Surfaces
Big Idea: Properties of parts of lines, curves, and surfaces can be seen and felt
Vocabulary
part of
a line 
not the whole line 
curve 
a line that is not straight but bent 
flat
surface 
a surface that is level and even 
curved
surface 
a surface that is not level or even 
slide 
to move along a smooth surface 
stack 
to arrange on top of each other 
roll 
move by turning over and over 

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Extra Practice

Chapter 19  Shapes and Patterns
Big Idea: Plane and solid shapes can be identified and classified. They can be separated and combined to make other shapes.
Vocabulary
plane
shape 
a plane shape has length and width, but no thickness 
hexagon 
a plane shape that has six sides 
trapezoid 
a plane shape that has four sides 
figure 
you can make a figure by combining different plane shapes 
pattern
unit 
one set in a series of repeated sets. 
shape 
The square, rectangle, triangle, and circle are plane shapes.
The cube, rectangular prism, cone, cylinder, and pyramid are solid shapes. 
face 
refers to every flat surface of a solid 
pentagon 
a plane shape that has five sides 
quadrilateral 
a figure with four straight sides 
repeating
patterns 
repeated sets of shapes arranged in a pattern 

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Extra Practice
