1.4/5 + 8/9
Answer: About 2
2.17/18-3/7
Answer: About 1/2
3.5x2 3/5
Answer: About15
4.25 7/8 / 2 8/9
Answer: About 9
5. Mr. Garcia's Class ate 3 2/3 Pizzas, Mrs. Rizzoli's class ate 4 1/8
Answer: About 11
The only one I disagree with is #3
3.5 x 2 3/5
appr 4 x 3 would only be 12 , and I guessed higher for both, so did you get all the way to 15?
better appr. :
3 times about 2.5 = 7.5 , overestimated
half of that again is 3.25
so $7.50 + $3.25 = 10.75 , so my guess would be 11 < ---- too high