School Name / Merrimac State School
Subject / Mathematics / Topic / Investigating Angles/ Order of Operations / Year / 6
Description / Sample Pre-Assessment for Unit 4
Instructions / Students complete the pre assessment task-Part A- Order of Operations
Part B- Angles
Task designed by / Kerri Fields / Contact / Janelle Dickman 0467 777 965
Student Name / Class / Date
Part A ORDER OF OPERATIONS
Question 1
Identify the order in which the operations are calculated. Write the numbers 1, 2 or 3 in each of the three boxes above the expression.
a)
2 x 6 + 4 – 2 =
b)
(3 + 5) + 6 ÷ 2 =
Question 2
Draw lines to match the following stories to their related expression.
Sam was given $20 for his birthday and has been saving his $2 pocket money for the last 10 weeks. How much money did he have ? / / 20 – 10– 2 =
Sally had $20 bought a meal deal for $10 and a treat for $2. How much money was left? / / (20– 10) ÷ 2 =
Tomwas given $20 and asked to buy items at the shop for $10. He then had to share the change equally with his sister Ann. How much money did Tom have left? / / 2 x 10 + 20 =
Question 3
Add brackets to the following expressions, if necessary, to make them true.
a) b)
4 x 5 + 6 – 3 = 23 5 + 5 + 5 ÷ 5 = 3
e)If no brackets were used in ‘b’, would the answer change? Calculate the answer to support your answer. Make sure you explain how you worked out your answer.
Question 4
Write a numerical expression to match each of the stories. You do not need to calculate the answer.
Mrs Dodd had 28 students in her class. Six students left to attend leadership camp and three were away sick. If four students joined her room from the class next door, how many students were in Mrs Dodd’s classroom? / Sarah had $25 in her wallet. She spent $10 on lunch and found $2 when walking home. Her sister had twice the amount of money as she did. How much money did her sister have? / Tom had a collection of 63 trading cards. He received seven more from a friend and lost two of his cards. He shared his cards with his the brother. How many cards washis brother given ?
Answer: / Answer: / Answer:
Question 5
Write in the operators (+, -, x or ÷) to make the following expressions true. Each operator can be used only once for each question.
a) b)
14 3 1 10 = 7 3 6 2 4 = 15
Question 6
Kristyknows to work left to right but doesn’t understand the other conventions when working with multiple operations.
What answer might Kristy write if she doesn’t follow the rules when working with order of operation?
65 – 5 –20x 3 =
a)Explain why you think she would give this answer.
PART B Investigating Angles
Instruction: A protractor cannot be used.
Angles on a straight line
- Angles on a straight line always add to 90 180 270 360 (tick 1)
- Without using a protractor, find the size of the unknown angles.
x
110 y 35
x = y =
Vertically opposite angles
- Vertically opposite angles are:
- Find the size of the unknown angles.
100 y 130
y
Angles at a point
- What do angles a, b, c, d and e add to?
b c
d
South East Region Learner Resource template V1 – Aug 2013