1 / 10

0.59

0.59. .09. 0.65. So what is a “ standard algorithm ” ?. Standard algorithm: a set of instructions that is used to perform a certain task. A step-by-step procedure for calculations. Here ’ s the question! 3.9156 + 3.99 =. I am right. I have lined all the numbers up.

yael-fitzgerald
Download Presentation

0.59

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. 0.59 .09 0.65

  2. So what is a “standard algorithm”? • Standard algorithm: a set of instructions that is used to perform a certain task. • A step-by-step procedure for calculations

  3. Here’s the question! 3.9156 + 3.99 = I am right. I have lined all the numbers up. Doh! I don’t have a clue what to do next?! I am right. My decimal place is in a line and all my numbers are in column. 3 . 9 1 5 6 3.9 9 3 . 9 9 3 . 9 1 5 6 7 9 3 . 9 1 5 6 3 . 9 9

  4. Algorithm for Add/Subt. Decimals: • Line up the numbers by the decimal point. • Fill in missing places with zeroes. • Add or subtract.

  5. Example 1: 28.9 + 13.31 Problem Explanation 28.9 0 Line up the numbers by the decimal point. Fill in missing hundredth place after the 9 with a zero. Add from right to left. + 13.31 42.21

  6. Subtracting Across Zeroes • If you have several zeroes in a row, and you need to borrow, go to the first digit that is not zero, and borrow. • All middle zeroes become 9’s. • The final zero becomes 10.

  7. Example 2: 15 – 9.372 0 1 4 9 9 10 Line up the numbers by the decimal point. Fill in missing spaces place after the decimal with zeros. Subtract from right to left using borrowing. .000 15 - 9.372 5 . 6 2 8

  8. ClassworkAdd or Subtract • 10.8 + 4.82 • 2.397 + 9.31 • 8.363 − 2.08 • 53.700- 0.351 • 0.793+ 0.624

  9. answers • 15.62 • 11.707 • 6.283 • 53.349 • 1.417

More Related