Match the first half of the sentence in column A with the second half in column B

Exercise 4: Match the first half of the sentence in column A with the second half in column B.
 
A
B
1. When we added up the receipts, abcdef
a. from 21 then you will get 11.
2. Can you blow up abcdef
b. research on early Christian art.
3. Dr. Carter is carrying out abcdef
c. to work out percentages.
4. He cut the paper abcdef
d. up into little pieces.
5. If you take 10 away abcdef
e. we realized we had spent too much.
6. I always use a calculator abcdef
f. this balloon?