Martin had 12 songs on his MP3 player. He was able to buy more songs, and he now has 3 1
3
as many songs. How many songs does Martin have?

Martin estimated the product to be 36.

12 × 3 = 36

How does his estimate compare to the actual product?
It’s a good estimate. The actual product is 35.
It’s a good estimate. The actual product is 40.
It’s a bad estimate. The actual product is 60.
It’s a bad estimate. The actual product is 120.