Approximate or Estimate
Rounding Whole Numbers
Rounding Decimals
Significant Figures
100

What is the difference between approximation and estimation?

Approximation is that is similar, but not exactly equal to a value. 

Estimation is when you use approximated values to calculate a rough answer.

100

Round the following digits to the nearest thousands


6,789.987

7000

100

Round the following number to 2 decimal places


4.56546

4.57
100

How many significant figures are in: 


56.8701

6 significant figures

200

Approximate the following to the nearest tenths


4.56 


4.6

200

Round the following to the nearest ten of thousands


978,673.98

980,000

200

Round the following number to the nearest thousandth


5675.5646

5675.565

200

How many significant figures are in: 


0.000067

2 significant figures

300

Approximate the following to the nearest hundreds 


765.24 + 652.42

1400

300

Round the following to the nearest millions


1,674,872

2,000,000

300

Round the following number to the nearest hundredths. 


567.599

567.60

300

Write your answer to one significant figure


0.0000768

0.00008

400

Please marks

GOOD JOB

400

Write your answer to the nearest whole number 


3 x 674.8

2024

400

Calculate the following numbers and give your answer to 2 decimal places 


467.25+ 567.267- 234.651

799.87

400

What is the answer for the following to 2 significant figures


0.023+ 0.024

0.047

500

If I went to the supermarket and picked up 5 items that total $5,500 when rounded to the nearest hundreds. Is it true or false?

Could the total be $5,499.99

TRUE

500
Calculate the following numbers and then express your answer to the nearest whole number. 


2 (405.6+ 234.3) 

1280

500

Add the following numbers and express your answer to 1 decimal place. 


56.78 + 62.23+ 101.56

220.6

500

What is the answer of the following to 2 significant figures


0.25 x 7

1.8