Tammy estimated the product of 4.2 and 5.9, then calculated the exact product. Analyze her work and
decide if she made an error.
Estimated product:
4.2(0.9) 4(6) - 24
Which statement about Tammy's work is true?
Tammy's estimate is wrong because the actual
product is 2.478.
Tammy's estimate is wrong because the actual
product is 247.8.
Tammy's estimate is right, but the actual product
should be 24.78.
Exact product:
4.2(5.9) = 2.478
Tammy's estimate is right, but the actual product
should be 0.2478