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

part part whole

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

partwhole part

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 = 3whole part part

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

times or 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.

4 X 3 = 12There are 12 strawberries in all.

3 = 2 +

2 x 4 = 88 2 = 4

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

3 + 3 + 3 + 3 = 12Groups of 3 are added 4 times.

3 x 5 = 15There are 15 buttons in all.

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.

odd and even numbers –

8 – 2 – 2 – 2- 2 = 0Groups of 2 are subtracted 4 times

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

The car is 4 meters long.

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

one block is as heavy as 4 coins

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

400 grams

650 grams

600 grams

400 grams

600 grams

650 grams

Chapter 9 – Vocabulary

the fish has a mass of 600 grams

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 A B

A B

most – container D has the most water

least – container B has the least amount of water

A

B

Container A has 1 quart of water.Container B has 1 quart 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.