# Author Archives: mathtricks

# How to Estimate Square Roots

In this post, we are going to learn a new trick. This is on how to estimate square roots. Suppose that you forgot your calculator and you have to calculate square root. Although you have no calculator, you are familiar with may perfect squares. For example, 13^2 (thirdteen squared) is 169 and 8^2 = 64. Let’s […]

# How to Multiply Using Intersecting Lines

Last month, we have learned a multiplication method using squares and diagonals. In this post, we are going to learn how to multiply using intersecting lines. In this method, we draw lines using one factor, draw lines to represent another factor, and then count the number of intersections to get the product. Let’s try the first example. […]

# 2015 Year in Review – Second Quarter

# Month in Review – June 2015

Starting last month, at the end of the month, or the first week of the month, I will be reviewing the posts for the whole month. In this post, we review what we have learned so far last month, June 2015. June 2015 in Review – Summary of Posts Multiplication Algorithm Using Squares with Diagonals discusses lattice multiplication where you […]