10.04 Table relationships, Elevator problems


1. The orchard has 206 apple trees and 385 cherry trees. 
About how many more cherry trees than apple trees does 
the orchard have?



2. What is the difference between 5,079 and 386?



3. Maureen is helping a local organization by stuffing envelopes. 
She must stuff 500 envelopes. She has already stuffed 321 envelopes.
How many more she needs to stuff. write an equation for it. 



4. Calculate the following

4 + (5  3) = 


(4 + 5)  3 = 


4  (5 + 3) = 


(4  5) + 3 = 


5. Consider the following table
x, y
1, 4
2, 8
3, 12
4, 16
5, ?

what is the missing number?



How are x and y related? write an equation.



6. What is the missing number?
(6 + 1)  3 = ________  3



7. What is the value of nin the following equation?
9 + (4  8) = n


8. Lisa is making friendship bracelets. She has 54 pieces of thread. 
Each bracelet requires 6 pieces of thread. 
How many friendship bracelets can Lisa make?


9. What number should go in the box to make the number sentence true?
(18 - 9) + 3 = 9 +  _______



10. What is the value of n?
40 / n = 5


11. Twenty-four people get on an empty elevator at ground level. 
At the first stop, 8 people get off and 6 people get on. 
At the second stop, 12 people get off and 10 people get on. 
At the third stop, 4 people get off and 2 people get on. 
How many people are on the elevator now?