unit 1 - online review level 5

unit 1

online review

Multiple Choice

What is

Four thousand, three hundred and fifty-five

in numbers?

• 4,355

• 4,553

• 14,305

• 14,355

Multiple Choice

What is 104,560 in words?

• One hundred thousand, four hundred and fifty-six

• One hundred and forty thousand, five hundred and sixty

• One hundred and four thousand, five hundred and sixty

• One hundred and four thousand, and fifty-six

Multiple Choice

Turn 7,432 into expanded form (partition form)

• 1000 + 1000 +1000 + 432

• 7,000 + 400 + 30 +2

• 7,000 + 300 + 40 + 2

• 7 + 4 + 3 + 2

Multiple Choice

Change this expanded form to standard form

40,000 + 3,000 + 100 + 20 +9

• 43,129

• 43,219

• 43,291

• 43,921

Multiple Choice

What is 450,823 in word form?

• Three thousand, four hundred and fifty-eight hundred twenty-three

• Four thousand, fifty-eight hundred twenty-three

• Four hundred and fifty thousand, eight hundred and twenty-three

• Four thousand, eight hundred twenty-three

Multiple Choice

Write in standard form:

Twenty-one thousand, seven hundred and ninety-one

• 21,079

• 2,179

• 2,791

• 21,791

Multiple Choice

What is

Six hundred and forty-three thousand, two hundred and eighty-four

in numbers?

• 643,248

• 643,284

• 643,428

• 643,842

Multiple Choice

Write in standard form:

One hundred thousand, five hundred and twelve

• 100,511

• 100,512

• 100,520

• 100,521

Multiple Choice

Change this expanded form to standard form

700,000 + 10,000 + 6,000 + 800 + 3

• 716,83

• 716,083

• 716,803

• 716,830

Multiple Choice

What is

Eight hundred and thirty-five thousand, two hundred and four

in numbers?

• 835, 240

• 835, 204

• 853, 240

• 853, 204

Let`s use decimal notation for tenths and hundredths and understand what each digit represents

Multiple Choice

What is the name of the place of the underlined digit in the decimal 5.2 ?

• ones

• tenths

Multiple Choice

What is the name of the place of the underlined digit in the decimal 0.5 ?

• ones

• tenths

Hundredths: The parts when one whole is split into a hundred.

​ A decimal number has three parts.

​

The whole part, decimal point, and the decimal part.

​

The decimal point stands between the whole part and the decimal part.

Multiple Choice

What is the name of the place of the underlined digit in the decimal 12.75 ?

• ones

• tenths

• hundredths

2.48 is two and forty-eight hundredths.

You can also read 2.48 as two point four eight

​

​ EXAMPLES

​

Look at the numbers in words and decimals.

​

* 2.3 → two and three tenths.

* 32.26 → thirty-two and twenty-six hundredths

* fifteen and five-tenths → 15.5

* sixteen and twenty-three hundredths → 16.23

* ten point zero eight →10.08

​Reading and writing decimals

Multiple Choice

Which of the following is 8.3 in words? 

• Eight and three tenths

• Eighty-three

Multiple Choice

Which of the following is 24.07 in words? 

• Twenty-four hundred and seven

• Twenty-four and seven hundredths

Let`s order numbers with one or two decimal places and compare using the < and > signs

​To compare decimal numbers, we need to compare the digits with the most value first

​Both numbers have 0 ones,

so we need to compare

the number of tenths they have instead.

​9 tenths are greater than 8 tenths, so 0.9 is greater than 0.84

Multiple Choice

Which one is bigger?

• 0.6

• 0.7

Multiple Choice

Which one is the smallest?

• 3.47

• 3.75

• 3.45

Adding zeros to the end of the decimal part of a decimal number does not change the number.

​

Look at the decimal numbers below,

they are all the same.

​

2.6 = 2.60 = 2.600 = ....

Rounding numbers

Examples

​300

Multiple Choice

• 50

• 60

Multiple Choice

• 200

• 210

Multiple Choice

• 900

• 1,000

Multiple Choice

• 6,200

• 6,300

Multiple Choice

• 4,000

• 5,000

Multiple Choice

• 11,000

• 12,000

Multiple Choice

• 3

• 4

Multiple Choice

• 9

• 10

​​How do we round numbers?

​STEP ONE: First, underline the digit in the place you are rounding to.

STEP TWO: Next, look at the digit to the right of the underlined digit.

STEP THREE:   If the digit is less than 5, round down.

If the digit is 5 or more, round up.

​​How do we round numbers?

​Example: What is 6275 rounded to the nearest 1000?

​

STEP ONE:  6,275

STEP TWO:  6,275

STEP THREE: The number 6,275 rounds down to 6,000

​

​Answer: 6,000

Properties of numbers

​We can identify multiples of 2, 5, 10, 25, 50 and 100 by looking at the digits in numbers

Multiple Choice

Which of the following number is even?

• 203

• 47

• 96

• 2021

Multiple Choice

Which of the following number is odd?

• 1998

• 33

• 68

• 78

​We can use these facts to help understand what happens when we add or subtract odd and even numbers.

Fill in the Blanks

Fill in the Blanks

Fill in the Blanks

Poll

Tick the numbers which are multiples of 5

• 83,820

• 50,507

• 165

• 20

• 13

Poll

Tick the numbers which are multiples of 10

• 205

• 520

• 1,020

• 2,021

• 45,800

Poll

Tick the numbers which are multiples of 100

• 400

• 680

• 1,700

• 5,870

• 352,000

Poll

Tick the numbers which are multiples of 25

• 125

• 600

• 855

• 12,000

• 64,255

Poll

Tick the numbers which are multiples of 50

• 155

• 400

• 625

• 5,000

• 52,750

Negative numbers

​positive

​negative

Multiple Choice

What kind of numbers are smaller than zero? 

• Positive numbers 
• Negative numbers 

Multiple Choice

Which of these is a negative number?

• 2

• -2

Multiple Choice

Which number is a negative number?

• 1
• 4
• -7

Multiple Choice

The numbers greater than zero are called what?

• Negative Numbers

• Positive Numbers

Multiple Choice

Which of these is a positive number?

• 6

• 0

• -9

When do we use negative numbers?

​Negative numbers are commonly used in describing

​below freezing point temperature,

​elevation below sea level,

​elevator level when it is below the ground level, etc.

Multiple Choice

What is the value of this thermometer ?

• 6 degrees

• 2 degrees

• -2 degrees

​comparing negative numbers

​Any number to the right is always more than the number to its left.

For example, 

4 is greater than 2; -1 is greater than -3.

Multiple Choice

Which number is SMALLER?

9 or -9

• 9

• -9

Multiple Choice

Which number is SMALLER?

-3 or -6

• -3

• -6

Multiple Choice

Which number is BIGGER?

-20 or 0

• -20

• 0

Multiple Choice

Which number is BIGGER?

8 or -4

• -4

• 8

Multiple Choice

Which number is greatest?

• -1
• -4
• -6

Multiple Choice

Which number is the biggest?

• -1
• -3
• -9

Multiple Choice

Which is the lowest number?

• -14
• -25
• -20

Sequences of numbers

​We can look for the rule between numbers in a sequence and use this rule to extend the sequence.

​

​

​Creating a pattern

​​We find the rule first.

The rule might be addition, subtraction, multiplication, or division.

Multiple Choice

Find the rule the pattern is using

2 , 7 , 12 , 17 , 22 , 27

• Add 5

• Subtract 5

• Add 20

• Subtract 20

Multiple Choice

Find the rule the pattern is using

172 , 162 , 152 , 142

• Add 5

• Subtract 5

• Add 10

• Subtract 10

Multiple Choice

Find the next number in the pattern.

3 , 12 , 21 , 30 , 39 , ?

• 40

• 44

• 48

• 49

Multiple Choice

Find the next number in the pattern.

1 , 2 , 4 , 8 , ?

• 10

• 12

• 14

• 16