You can often tell what a word means by its in a sentence. a. placement b. order c. context d. spelling hyphen

The answer would be placement because if a word you dont know is in a sentence, you could read around it (the whole sentence) to get the gist of what it means. Hope this helps! ^-^

Show his work so he doesn’t get points taken off. this is because even if he can do calculations in his head, he may make a mistake and having it on the paper will not only him find mistakes but show that he was doing the work as well.