A common misconception is that ELF files are just for executables. We already have seen they can be used for partial pieces (object code). Another example includes shared libraries, and even core dumps (those core or a.out files). ELF is also used for the kernel and kernel modules on Linux machines.
If you know your addition and multiplication tables by heart, your next step is to get to know Fred. In this book (Life of Fred: Fractions) and the next book (Life of Fred: Decimals and Percents) you can learn everything you need to know to begin algebra! In one morning, our hero: Teaches a class at the university.
Another difficulty is that the rules for ordering fractions with like numerators do not apply to fractions with like denominators. In this situation, children can use their already learned ideas about counting. For example, a student might reason that the fraction 5/7 is greater than 2/7 because 5 is greater than 2. When adding or subtracting fractions, children may have ideas about whole numbers that conflict with their ideas about fractions. An estimation item from the second NAEP reveals this phenomenon. Students were asked to estimate the answer to 12/13 + 7/8.