Estimating square roots worksheet, 7th grade math - Math 4 Children Plus Print Worksheet This is a square roots worksheet for 7 th grade. It is an estimating square roots worksheet. On it, grade 7 students will learn to find the square root of numbers. Remember that square roots refer to the inverse operation of squaring a number. For example, 5 squared equals 25, however the inverse of this i.e. the square root is 5.