1 / 12

Mr. Gibson Science Classes – all disciplines September 12 th & 13 th SY-2011/2012

Re-teach/Re-assess Scientific Notation Mathematical Operations for Significant Figures (Sig. Figs.). Mr. Gibson Science Classes – all disciplines September 12 th & 13 th SY-2011/2012. Sig. Figs Addition & Subtraction. Adding Expanded numbers with proper number of Sig Figs in the sum .

iliana-schmidt
Télécharger la présentation

Mr. Gibson Science Classes – all disciplines September 12 th & 13 th SY-2011/2012

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Re-teach/Re-assessScientific NotationMathematical OperationsforSignificant Figures (Sig. Figs.) Mr. Gibson Science Classes – all disciplines September 12th & 13th SY-2011/2012

  2. Sig. FigsAddition & Subtraction Adding Expanded numbers with proper number of Sig Figs in the sum. _______________ We will add the following three numbers shown to the right to illustrate the rules for sig. figs. 5.0 cm 5.355 cm + 5.68 cm = ? cm Step 1: Carry out the addition first…

  3. Sig. FigsAddition & Subtraction Adding Expanded numbers with proper number of Sig Figs in the sum. _______________ We will add the following three numbers shown to the right to illustrate the rules for sig. figs. 5.0 cm 5.355 cm + 5.68 cm = 16.035 cm Step 1: Carry out the addition first…

  4. Sig. FigsAddition & Subtraction Adding Expanded numbers with proper number of Sig Figs in the sum. _______________ We will add the following three numbers shown to the right to illustrate the rules for sig. figs. 5.0 cm 5.355 cm + 5.68 cm = 16.035 cm Step 2: Locate the number in the group being added together that has the fewest decimal places.

  5. Sig. FigsAddition & Subtraction Adding Expanded numbers with proper number of Sig Figs in the sum. _______________ We will add the following three numbers shown to the right to illustrate the rules for sig. figs. 5.0 cm 5.355 cm + 5.68 cm = 16.035 cm Step 3: round off the answer so that it has the SAME number of decimal places as the number in the problem with the fewest.

  6. Sig. FigsAddition & Subtraction Adding Expanded numbers with proper number of Sig Figs in the sum. _______________ We will add the following three numbers shown to the right to illustrate the rules for sig. figs. 5.0 cm 5.355 cm + 5.68 cm = 16.0 cm In this example the answer will only have one decimal place just like 5.0 in the problem did.

  7. Sig. FigsAddition & Subtraction Adding Expanded numbers with proper number of Sig Figs in the sum. _______________ We will add the following three numbers shown to the right to illustrate the rules for sig. figs. 10.2 cm 10.0 cm + 10 cm = ? cm Step 1: Add up the numbers; Step 2: Find the number with the smallest number of decimal places; Step 3: Round-off the answer so that its decimal places = the number in the problem with the lowest decimal places.

  8. Sig. FigsAddition & Subtraction Subtracting Expanded numbers with proper number of Sig Figs in the sum. _______________ We will add the following three numbers shown to the right to illustrate the rules for sig. figs. 10.2550 cm - 5.005 cm = 5.2500 cm Step 1: subtract the numbers;

  9. Sig. FigsAddition & Subtraction Subtracting Expanded numbers with proper number of Sig Figs in the sum. _______________ We will add the following three numbers shown to the right to illustrate the rules for sig. figs. 10.2550 cm - 5.005 cm = 5.2500 cm Step 2: Find the number with the smallest number of decimal places;

  10. Sig. FigsAddition & Subtraction Subtracting Expanded numbers with proper number of Sig Figs in the sum. _______________ We will add the following three numbers shown to the right to illustrate the rules for sig. figs. 10.2550 cm - 5.005 cm = 5.2500 cm Step 3: Round off your answer such that it is the same as the number in the problem with the smallest number of decimal places;

  11. Sig. FigsAddition & Subtraction Subtracting Expanded numbers with proper number of Sig Figs in the sum. _______________ We will add the following three numbers shown to the right to illustrate the rules for sig. figs. 10.2550 cm - 5.005 cm = 5.250 cm Step 3: Round off your answer such that it is the same as the number in the problem with the smallest number of decimal places;

  12. Sig. FigsAddition & Subtraction Adding Expanded numbers with proper number of Sig Figs in the sum. _______________ Now go get a Chemistry text book – turn to page 41 and do problems 35 & 36. Be prepared to put your work on the board when called. Step 1: Find the number with the smallest number of decimal places; Step 2: Add up or subtract the numbers as indicated by the problem; Step 3: Round-off the answer so that its decimal places = the number in the problem with the lowest decimal places.

More Related