Tuesday, July 15, 2014

Estimating Products and Quotients

Introduction

In one of our previous posts, we talked about estimating the sums and differences of numbers. Well, in this topic the concept is the same...estimation. The only difference is that we will be working with products and quotients. 

Just as a review...let's go over our key terms for this topic:

  • Estimation is just an educated 'math guess' we make in order to make numbers easier for us to calculate.
  • Products are just the answers to multiplication problems.
  • Quotients are just the answers to division problems.

Estimating Products...

Let's say that we have a problem such as the following:

  246
x  23
------

The first step is estimating. Let's estimate these numbers to the nearest tens place. 

246=250
23=20

The next step is just simple multiplication!

 250
x 20
------
5,000

So that means the estimated product for 246*23 equals 5,000.

Estimating Quotients...

Let's say that we have a problem such as the following:

435/8

Let's estimate the numbers to the nearest tens place so that our numbers are compatible with each other.
435=440
8=10

Now, just simply divide!

440/10
=44

That means that the estimated quotient for the problem 435/8 equals 44!

Now wasn't that a piece of pie!


 Sheet 1 How to Estimate Products and Quotients












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