Chapter 10 – Vocabulary

sum – the result when numbers are added. 50 + 35 = 85

add mentally – adding numbers in your head without paper and pencil

difference – the result when one number is subtracted from another 50-35=15

subtract mentally – subtracting numbers in your head without paper & pencil

Find 64-8 (64-10 = 54, 54 + 2 = 56 SO 64-8 = 56)

number line – a line that shows numbers in increasing size from left to right

about – an estimate 82 is about 80

round – 44 is 40 when rounded to the nearest ten

nearest ten – look at the digit in the ones place..if it is 0,1,2,3,4 round to the ten that is

less..if it

is 5,6,7,8,9 round to the greater ten

estimate – an estimate is a number close to an exact amount 105 + 7 is about 110

reasonable – you can use rounding to estimate sums and differences & check that answers

are

reasonable….105 + 7 = 112, 105 is about 110, 7 is about 10, 105 + 7 is about

120..Because 120 is

close to the actual sum, which is 112, the answer is reasonable.

Chapter 11- Vocabulary

$1.00 one dollar – a bill with a $1.00 or 100 cents

$5.00 five dollars – a bill with a value of $5 or 500 cents

$10.00 ten dollars – a bill with a value of $10 or 1,000 cents

$20.00 twenty dollars – a bill with a value of $20 or 2,000 cents

dollar sign - $ a sign that indicates the value of the amount in dollars

decimal point - . a dot that separates the cents from the dollars in money amounts

table – you can use a table to organize data in rows and columns

Dolla

rs

Cents

15 20

Chapter 12- Vocabulary

equal – each part is the same size

unequal – not the same size

whole – a whole describes and entire figure and is equal to one.

fraction – a number that names equal parts of a whole

one half – one of the parts you get when you divide something into 2 equal groups

one third – one of the parts you get when you divide something into 3 equal parts

one fourth – 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 than in value ( < )

like fractions – the bottom numbers are the same

Chapter 13 – Vocabulary

Foot/feet (ft) – a customary measurement of length 1 foot = 12 inches

length – describes how long something is

width – describes how wide something is

ruler – tool used to measure lengths of objects

unit – an inch is a unit of measurement

height – describes how tall something is

longest – a word used when ordering 3 objects by length

shortest – a word used when ordering 3 objects by length

inch (in.) – a customary measurement of length

Chapter 14 – Vocabulary

hour hand – short hand on the clock

minute hand – long hand on the clock

minute – 9:15

hour – 9:15

o’clock – when the minute hand is on the 12

after – tells how many minutes after o’clock

clock face – this is a clock face, the short hand tells the hour, the long hand tells the

minutes

after the hour

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

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

Chapter 15 – Vocabulary

skip-count – counting by a given number..you can skip count by 3’s s,6,9,12,15,18,21

dot paper – a dot paper shows a set of dots in equal rows and equal columns

related multiplication facts – 3 x 4 = 12 and so does 4 x 3 = 12

Chapter 17 – Vocabulary

picture graph – a graph that uses a picture to represent data

key – a sentence that tells what each picture or symbol on a picture graph stands for

Key: = 3 books

symbol – a picture that represents data in a picture graph stands for 4 days

record – to keep track of data or information

tally chart – a way to record data using lines

line plot -

Chapter 18 – 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..objects must have a flat surface

stack – to arrange on top of each other ..objects must have flat surfaces

roll – you can roll objects that have curved surfaces

Chapter 19 – Vocabulary

plane shape – has length and width, but no thickness such as squares, rectangles, triangles

& circles

hexagon – a plane shape that has 6 sides

trapezoid – a plane shape that as 4 sides

figure – you can make a figure by combining different plane shapes

quadrilateral – a shape with 4 sides

pentagon – a 5 sided figure

angle – 2 rays joined together at a point

face – a flat surface on a 3-dimensional figure

pattern – something that changes in regular way 121221212

repeating pattern – repeated sets of shapes arranged in a pattern

pattern unit – one set in a series of repeated sets

shape – you can make a repeating pattern using different shapes

size – how big or small something is

turning point – moving something so that it points to a different direction