Module 2 Mathematics Estimating Differences Let's take a brief review. Activity 1 Subtract the following. 1. 8537 2. 7642 3 154 - 4 321 3. 9 752 3863 4. 6430 551 5. 762 - 6731 Do you remember your previous lesson on estimating the sum? We know that a certain problem is about ating when the following key words appear about, estimate and approximately The process on estimating the difference is the same process on estimating the sum. The process differs only on the operation being used. In estimating sums, we follow the steps below. Step 1. Round off the addends to the hundreds place. Step 2. Add the rounded off numbers. This time, to estimate the difference let us follow same steps put change the operation in Step 2 from add to subtract. Can you do that? Let us see how will you do it by performing the next activity.
