Estimating and Rounding quiz

• newEditor
• Mathematics
• Primary Education

Estimating & Rounding QUIZ

Round this number to the nearest 10 76

A

75

B

70

C

80

D

66

Round this number to the nearest 10 83

A

80

B

83

C

90

D

88

Estimate this number to the nearest 100 567

A

456

B

600

C

500

D

700

Round 235 to the nearest ten.

A

200

B

345

C

240

D

340

Round this number to the nearest 10 666

A

345

B

670

C

660

D

680

What is Rounding?

 

• When a question asks you to round or estimate, you are being asked "about how many?"
  

• Your approximate number will help you solve problems that maybe hard to solve.

What to do?

•  When rounding to the nearest ten up to 100. Your answer will be one of the numbers below because they are multiples ten.

• 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100.

• The rule to rounding 0, 1, 2, 3, 4 round down.
    5, 6, 7, 9, 9 round up.

Rounding poem

Remembering this poem with the rule will also help you round.

• Find your number.

• Look right next door.

• 4 or less just ignore.

• 5 or more, add 1 more.

Using a number line

Remember the poem.

Round 36 to the nearest ten.

Put the circle around that number.

30

40

Using a number line

Round 74 to the nearest ten.

Put the circle around that number.

70

80

70

Your turn to try!

Round 5 to the nearest ten.

0

10

A

0

B

10

C

6

D

20

Round 19 to the nearest ten.

10

20

A

20

B

10

C

19

D

11

Round 73 to the nearest ten.

70

80

A

70

B

75

C

80

D

85

Round 77 to the nearest ten.

70

80

A

70

B

75

C

80

D

85

Round 92 to the nearest ten.

90

100

A

90

B

95

C

97

D

100

Keep the poem in mind

The rule to rounding 0, 1, 2, 3, 4 round down.

5, 6, 7, 9, 9 round up.

• Find your number.

• Look right next door.

• 4 or less just ignore.

• 5 or more, add 1 more.