Estimation questions are often missed on number sense tests. I think it is difficult to learn to round accurately (is that an oxymoron?)... This concept combines our understanding of exponents (which we haven't covered yet in this blog) and multiplication. It appeared 16 times last year--8 times each at question # 50 and question # 60.
Number Dojo Level: 277
On middle school tests, students are used to seeing a single integer or decimal, usually less than 10, raised to some power. We will cover this variation in the first few examples. But on high school tests, students are often asked to multiply and/or divide 2 or more such numbers. And like I always teach, when asked to multiply and divide in the same problem, divide before you multiply!