LI:We are learning how to use BODMAS to help solve equations
SC: I can explain how to use BODMAS to help solve equations
I am going to model how to solve these first two problems:
Before we do the third question, what do you think some common mistakes would be?
Have a go now at solving Q3 and 4 on your whiteboard.
If you are confident, you can go ahead to Q5 and 6.
Activities:
Group 1: With Mr Blain (In Open Area) Sarah, Em. B, Matilda, Jayda, Josh, Jarvis, Logan, Erika, Nakita
We are going to work together to solve the following task cards. You will need your Maths book and a pencil/pen. http://bit.ly/2cSS1Tx
Group 2: Aiden, James, Tahlia, Kya, Connor, Paddy, Owen, Cam Solve the following task cards. The dot in some of the equations represents multiplication. http://bit.ly/2cTuIHx
Group 3: Daniel, Jess, Emz, Jack, Jade Interactive game to practise solving equations using correct order of operations - you must select which part of the equation you wish to solve first, and do it http://mrnussbaum.com/order-ops-ipad.html Once finished, complete this worksheet(includes brackets, all four operations and basic indices) ensuring they show all working out - one step at a time.
Lesson 1:
LI:We are learning to understand the importance of the order of operations.
SC: I can explain what BODMAS is and prove that the order an equation is solved in affects the answer.
Look at this equation: 12 + 4 x 5 – 4 =
Who would like to read it aloud?
That’s one way to read it. Let’s look the punctuation in the following sentences to read it aloud in three different ways (emphasise the pauses at commas!)
Twelve plus four, times five, minus four, equals… 76
Twelve, plus four times five, minus four, equals… 28
Twelve plus four, times five minus four, equals… 16.
Instead of commas, in Maths we can use brackets to show which parts of a sum go together.
Look at these sums: (12 + 4) x 5 – 4 = 12 + (4 x 5) – 4 = (12 + 4) x (5 – 4) =
Did you notice that in each case we solved the brackets first? The order in which we solve equations is extremely important! That’s why we were able to get three different answers from the same equation! This unit of work is all about understanding the rules for the order of operations, to help make sure everyone gets the same answer.
Let’s watch this video:
The BODMAS rule helps you to remember the correct order for solving equations.
When all the operations are of equal importance, simply work from left to right.
We are now going to use this anchor chart to help us solve the following sum:
5 + 3 x 7 - 2 =
Learning task:
You are going to use this template to make a page in your Maths book, like the anchor chart shown below.
Before you start though, why does the template have this shape? D and M will be on the same level - why do you think that is?
Early Finishers: Have a go at the following questions:
More BODMAS Questions:
48 – 12 ÷ 4 =
18 – ( 9 x 4 ) + 32 =
72 – (8 x 7 ) + 9 =
(16 + 7 ) x ( 9 - 3 ) +10 =
7 + (6 × 52 + 3)
Reflection: Refer back to LI and SC. 20 word challenge: You have exactly 20 words to describe what we have been learning about today. No more, no less... you must use exactly 20!