Chapter 1 – Vocabulary
hundred- 10 tens = 100
hundreds- 138 = 1 hundred 3 tens 8 ones
thousand – 10 hundreds = 1,000
standard form– 657 is the standard form of 657
expanded form – 400 + 30 + 2 is the expanded form of 432
word form – three hundred twenty-eight is the word form on 328
greater than ( < ) - 6 stars is greater than 4 stars
less than ( > ) - 4 stars is less than 6 stars
greatest- 20 is the greatest number
least - 2 is the least number
more than - there are more than
there are 2 more than
less than - there are less than
there are 2 less than
Chapter 2 Vocabulary
add – put together two or more parts to make a whole
place-value chart -
regroup – sometimes you need to regroup numbers when adding and subtracting. When you regroup numbers, you change: 10 ones to 1 ten or 1 ten to 10 ones; 10 tens to 1 hundred or 1 hundred to 10 tens
Chapter 3 – Vocabulary
subtract – take away one part from the whole to find the other part 5 – 2 = 3
Chapter 4 – Vocabulary
join – when you join sets, you add the number of objects in one set to the number of objects in another set to find the total
There are 4 flowers in all
set – a collection of items. There are 2 sets of triangles
take away – subtract one part from the whole to find the other part 5 – 2 = 3
compare – when you compare, you find out which set has more or fewer things. Compare the strawberries and apples:
There are 2 more strawberries than apples. There are 2 fewer apples than strawberries.
Chapter 5 – Vocabulary
timesor multiply – put all the equal groups together. There are 4 groups and 3 strawberries in each group.
equal – having the same amount or number
3 is the same as 2 + 1
group or equal groups – having the same amount in each group. You add equal groups to multiply. You subtract equal groups to divide.
There are 4 red marbles in each group.
repeated addition – you can use repeated addition to find the number of marbles.
multiplication sentence – 3 x 3 = 9 is a multiplication sentence
multiplication story –
There are 3 children. Each child has 5 buttons.
share – divide into equal groups
divide – put into equal groups or share equally
15 apples is divided into 3 equal groups of 5
division sentence – 6 2 = 3 is a division sentence
repeated subtraction – you can use repeated subtraction to find the number of groups.
oddand even numbers –
Chapter 6 – Vocabulary
hundred- 10 tens = 100
hundreds- 138 = 1 hundred 3 tens 8 ones
thousand – 10 hundreds = 1,000
standard form– 657 is the standard form of 657
expanded form – 400 + 30 + 2 is the expanded form of 432
word form – three hundred twenty-eight is the word form on 328
Chapter 7 – Vocabulary
meterstick – a meterstick is used to measure length. 1 meter = 39.07 inches
meter (m) – a metric unit of length
width – how wide an object is
length – describes how long something is
unit – units are used to measure objects. Paper clips can be used to measure. A paper clip represents 1 unit. The pencil is about 4 units long.
height – to measure how tall something is
taller –
tallest –
shorter –
shortest –
longer –
longest –
centimeter (cm) –a metric unit of length. The fish is 4 centimeters long.
Chapter 8 – Vocabulary
kilogram (kg) – a metric unit of mass. The mass of the bowl of fruit is 5 kilograms.
mass – how heavy an object or a set of objects is. The mass of the toy is 3 kilograms.
measuring scale – this tool measures the mass of an object
as heavy as –
less than – the mass of the potatoes are less than 1 kg
more than – the mass of the bag of flour weighs more than 500 grams
heavier than – the lemons are heavier than the peaches
lighter than – the peaches are lighter than the lemons
heaviest –
lightest –
gram (g) –a metric unit of mass
Chapter 9 – Vocabulary
volume – the amount of liquid a container has
more than – container B has more liquid than container A
less than – container A has less liquid than container B
as much as – container A has as much water as container B
most – container D has the most water
least – container B has the least amount of water
liter (L) – a metric unit of volume. This carton contains 1 liter of milk.
measuring cup –this is a 1-liter measuring cup.