There were places where students had to find the common denominator for two fractions, but nothing else. There were places where diagrams spelled out exactly what the kids were supposed to do, so all they had to do was count squares. There were places where kids were told to use a calculator to add fractions, and even a page where kids were supposed to use a slide rule to add fractions.
But for problems requiring multi-step fraction add/sub (ie. find the common denominator, change each fraction into one with that denominator, do the addition, then reduce the fraction to its simplest proper form): just 65 of them.
In addition nearly all of them were very simple, with denominators like: 2 & 4, 4 & 8, 3 & 6, etc. Absolutely none had a denominator larger than 10.
I assigned our 10-year-old boy a page of 40 to do yesterday, and moved on to do both multiplication and division today. He got the idea of a reciprocal quickly, and loved the idea that dividing one-half, was the same as multiplying by 2. I don't believe EM ever deals with the concept of a reciprocal, thinking it's too hard for the poor wee little things to understand.
Unfortunately, he's stuck in 5th grade EM next year with no chance to do anything else, except at home after school.