kwizNET Subscribers, please login to turn off the Ads!
 Email us to get an instant 20% discount on highly effective K-12 Math & English kwizNET Programs!

#### Online Quiz (WorksheetABCD)

Questions Per Quiz = 2 4 6 8 10

### Grade 7 - Mathematics1.13 Addition and Subtraction of Two Numbers in Scientific Notation

 Addition and Subtraction of Two Numbers in Scientific Notation: To add or subtract two numbers in scientific notation, they must both have the same exponent. So you may have to re-write one of the numbers to have the same exponent as the other. Example 1: 1.0 x 103 + 6 x 102 Solution: Rewrite 6 x 102 so that the exponent is 3. 1.0 x 103 + 6 x 102 = 1.0 x 103 + 0.6 x 103 = 1.6 x 103 We can check this by converting the numbers first to the more familiar form. 1.0 x 103 =1000 6 x 102=600 1.0 x 103 + 6 x 102=1000 + 600 = 1600 Converting 1600 to scientific form= 1.6 x 103 Example 2: 1.0 x 103 + 6 x 102 Solution: Rewrite 6 x 102 so that the exponent is 3. 1.0 x 103 - 6 x 102 = 1.0 x 103 - 0.6 x 103 = 0.4 x 103 Directions: Solve the following problems. Also write atleast 5 examples of your own.
 Q 1: 9.8 x 109 - 5.2 x 1096.4 x 1094.6 x 1084.6 x 109 Q 2: 2.0 x 102 + 3.0 x 1033.2 x 1033.2 x 1043.2 x 102 Q 3: 2.0 x 107 - 6.3 x 1051.937 x 1051.937 x 10719.37 x 107 Q 4: 1.2 x 103 + 3.3 x 1034.5 x 1034.5 x 1024.5 x 106 Q 5: 3.2 x 105 + 5.1 x 1043.71 x 1053.71 x 1063.71 x 104 Q 6: 3.3 x 103 - 1.1 x 103 4.4 x 1042.2 x 1032.2 x 102 Q 7: 1.1 x 103 + 3.3 x 1031.1 x 1044.4 x 1034.4 x 104 Q 8: 3.8 x 104 + 5.2 x 1049.0 x 1039.0 x 1045.9 x 104 Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!

#### Subscription to kwizNET Learning System offers the following benefits:

• Unrestricted access to grade appropriate lessons, quizzes, & printable worksheets
• Instant scoring of online quizzes
• Progress tracking and award certificates to keep your student motivated
• Unlimited practice with auto-generated 'WIZ MATH' quizzes
• Child-friendly website with no advertisements
• Choice of Math, English, Science, & Social Studies Curriculums
• Excellent value for K-12 and ACT, SAT, & TOEFL Test Preparation
• Get discount offers by sending an email to discounts@kwiznet.com

 Quiz Timer