Should an estimate or the exact answer be calculated? Then do the appropriate calculation.

The sewing club needed 90 yards of lace to finish their various projects. They had 2 rolls of lace that had yards on each roll and 3 rolls with yards of lace on each roll. Did they have enough lace to finish their projects?

A.
An estimate can be used to know if they have enough lace.
12 • 2 + 24 • 3 = 96
They have at least 96 yards of lace.

B.
The exact answer is needed to know if they have enough lace.
They have yards of lace.

Question

Should an estimate or the exact answer be calculated? Then do the appropriate calculation.
 
The sewing club needed 90 yards of lace to finish their various projects. They had 2 rolls of lace that had   yards on each roll and 3 rolls with   yards of lace on each roll. Did they have enough lace to finish their projects?
 
 A.
An estimate can be used to know if they have enough lace.
12 • 2 + 24 • 3 = 96
They have at least 96 yards of lace.
 
 B.
The exact answer is needed to know if they have enough lace.
They have   yards of lace.

sooobored · Answer

there are missing numbers in the problem.

An estimate can only give you a rough idea or a general range of how much is required. but if you want to compare numbers an exact value is required

khameleon · Answer

Should an estimate or the exact answer be calculated? Then do the appropriate calculation.
 
The sewing club needed 90 yards of lace to finish their various projects. They had 2 rolls of lace that had   yards on each roll and 3 rolls with   yards of lace on each roll. Did they have enough lace to finish their projects?
 
 A.
An estimate can be used to know if they have enough lace.
12 • 2 + 24 • 3 = 96
They have at least 96 yards of lace.
 
 B.
The exact answer is needed to know if they have enough lace.
They have   yards of lace.