10.03 Two variable relationships, rounding

1. which of the following will 708 x 53 be close to?
	a) 5,000
	b) 25,000
	c) 35,000
	d) 48,000
(hint) round the numbers and multiply.




2. what will be the last digit when you multiply 708 x 53?




3. what is the exact value when you multiply 708 x 53?



4. The museum shop sold 30 large dinosaur models. 
Each model cost $25. How much money did the shop receive from 
the sale of the dinosaur models?



5. Tom has $10. He will earn half that amount by raking leaves 
for Mr. Cooper. Which equation could be used to show the amount 
of money Tom will have in all after Mr. Cooper pays him?

	a) $10 / 2 =
	b) $10 + $10 =
	c) ($10  2) + $10 =
	d) ($10 / 2) + $10 = 

	
	
	
6. Kelsey stacked cans for a supermarket display. 
She placed 25 cans on each shelf. 
If she filled 15 shelves, how many cans did she stack?




10. Consider the following table
x, y
81, 9
54, 6
27, 3

which of the following equation represents this

y = x  9
y = x  9
y = x ? 32
y = x + 32


11. About how much is 560 + 365?




12. What is the missing number?

408,298 = 400,000 + _________________ + 200 + 90 + 8
	




13. Calculate the following:

35 + (6 - 4) = 


35 - (6 + 4) = 
 

(35 -6) + 4 = 


(35 - 4) + 6 = 



14. What is the missing number

38 + __________  = 53



15. Which expression is not equivalent to (29 + 15) / 8?
	a) 44 / 8
	b) 29 + (15 / 8)
	c) 29 / (15 / 8)
	d) 29 + 7

hint 1: replace each bracket with its value 	
hint 2: Calculate the value in each case
hint 3: Problems like this are time consuming
	do them the last
	
	


16. see the following table

x, y
3, 9
5, 11
11, 17
15, 21


how are x and y related?

a) y = x+5
b) y = x+6
c) y = x-6
d) y = x - 7



17. What is the value of "n"
(16 / 9) + (15 + 12) = n




18. what is the missing number?
(10 - 3) + 8 = _______ + 8




19. An adult's shirt costs $6 more than a child's shirt. 
Write an expression that represents the cost of an adult's shirt 
when "p" stands for the cost of a child's shirt?