estimation

Question 1

WHAT DOES ESTIMATE MEAN?

Answer 1

ROUND TO 1 SIGNIFICANT (IMPORTANT) NUMBER!

Question 2

ROUND 4213 TO 1,2&3 SIGNIFICANT FIGURES?

Answer 2

1 - 4000
2 - 4200
3 - 4210

Question 3

ROUND 6435 TO 2 SIGNIFICANT FIGURES?

Answer 3

6400

Question 4

WHAT HAPPENS TO THE REST OF THE NUMBERS AFTER THE ROUNDED NUMBER?

Answer 4

THEY ALL BECOME ZEROS!

Question 5

HOW DO YOU WORKOUT 68.7 X 33.8

Answer 5

ROUND THE NUMBER TO THE NEAREST 1 SIGNIFICANT NUMBER:
70 X 30
AND THEN TIMES THE TOGETHER
70 X 30 = 2100

Question 6

HOW DO YOU WORKOUT 612 X 86?

Answer 6

ROUND THE NUMBERS TO THE NEAREST 1 SIGNIFICANT NUMBER:
600 X 90
AND THEN TIMES THEM TOGETHER:
= 54000

Question 7

WHAT IS 578 X 0.18?

Answer 7

ROUND THE NUMBERS TO THE NEAREST 1 SIGNIFICANT NUMBER:
600 X 2
THEN TIMES THEM TOGETHER:
= 3000

Question 8

WHAT IS 42 DIVIDED BY 5.3?

Answer 8

ROUND THE NUMBERS TO THE NEAREST 1 SIGNIFICANT NUMBER:
40 X 5
AND THEN DIVIDE THEM TOGETHER:
= 8

Question 9

WHAT IS 819 DIVIDED BY 18.7?

Answer 9

ROUND THE NUMBERS TO THE NEAREST 1 SIGNIFICANT NUMBER:
800 / 20 
THEN SIMPLIFY THE NUMBERS BY / BY 10:
80 / 2 
AND DIVIDE THEM TOGETHER:
= 40

Question 10

WHAT IS 813 X 19.8 / 97.6?

Answer 10

ROUND THE FIRST SECTION IF NUMBERS AND WORK IT OUT:
800 X 20 = 1600
THEN ROUND THE LAST NUMBER AND DIVIDE 1600 BY YOUR ROUNDED NUMBER:
1600 / 100 = 160

Question 11

WHAT SHOULD I REMEMBER WHEN DOING ESTIMATION?

Answer 11

NEVER GIVE THE EXACT ANSWER! ALWAYS MAKE IT 1 OR 2 OFF!