Calculating with Powers of Ten (Räkna med tiopotenser)

Ämne / Topic

Calculations involving scientific notation.

Inlärningsmål / Learning Goals

After this lesson you should know / understand....

Whiteboard: I know... I understand...I can do... 

Write numbers using the appropriate prefix.

Perform calculations involving scientific notation.

Google Slides & Videos

Lektionssteg / Steps in the lesson: 

1. Lektionsuppvärmning / Lesson warm up / Hook / Review from previous lesson

Lesson 1: (Calculations using scientific notation)

Revising scientific notation through brainstorming.

Learners will come up to the white board and add their thoughts and what they learned about scientific notation to the mind map - as a class discuss the mind map and the learners thoughts.

2. Introduktion till lektionen / Introduction to the lesson content 

• Multiplication calculations using scientific notation.

• Division calculations using scientific notation.

3. Aktiviteter / Key Activities 

How to Multiply and Divide in Scientific Notation

To make it easier to work with extreme numbers, chemists turn to scientific notation, which is a special kind of exponential notation. A major benefit of presenting numbers in scientific notation is that it simplifies common arithmetic operations like multiplication and division.

Multiplying in scientific notation

To multiply two numbers written in scientific notation, you work out the coefficients and the exponents separately. 

Here’s an example:

4. Kolla vad eleverna kan / Check for understanding / Exit ticket

Learners will complete two questions. One will be using multiplying scientific notation and the other will be dividing using scientific notation. After being given time to complete the questions, two learners will be selected at random to show the class how they solved the question.

(4.3 x 105)(2 x 107)

18 x 10⁶

4 x 10⁴

5.  Avslutning / Closure / Summary of lesson

As a class we will discuss how we could use scientific notation at school and where we could possibly adopt it to make our lives easier.

Resurser & Materiel / Resources & Materials

http://webbapp.liber.se/matematikboken-z/#

http://webbapp.liber.se/matematikboken-z/#/1-taluppfattning-och-tals/1-6-r-kna-med-tiopotenser/film

Textbook work:

ETT pg.44 - 1141 abc, 1142 abc, 1145 ab, 1146

TVÅ pg.45 - 1148 abc, 1149 ab, 1152, 1153

TRE pg. 45/46 - 1155 abc, 1156, 1157 abc, 1158, 1159, 1160 abc

FYRA pg.46/47 - 1162 abc, 1164, 1165, 1166, 1167