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Year 9 Addition Assessment

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Year 9 Addition Assessment

Answer every question. Show your working for calculation and problem-solving questions. Use dollars and cents where appropriate.

Multiple Choice

1.What is 6,284 + 3,759?

10,043
10,033
9,943
10,143

2.Which sum has a total of 18.6?

9.8 + 8.7
7.9 + 10.7
12.4 + 6.1
8.6 + 9.9

3.Use the number line to work out −12 + 19.

4.Select every statement that correctly describes an addition property.

11 + 0 = 11 — identity property
4 + 9 = 9 + 4 — commutative property
(1 + 6) + 3 = 1 + (6 + 3) — associative property
13 + (−13) = 0 — additive inverse

Problem Solving

5.Calculate 3⅜ + 2⅚. Give your answer as a mixed number in simplest form.

6.Georgia paid $36.75 for groceries, $54.90 for a bus pass and $16.80 for a book. How much did she spend altogether?

7.A community group is arranging a visit for 24 people. The minibus costs $385. Entry costs $14.25 per person, and lunch costs $9.80 per person. What is the total cost of the visit?

8.At 7 am the temperature was −5°C. It increased by 11°C by midday, then increased another 3°C by late afternoon. What was the late-afternoon temperature?

Extended Problems

9.In this addition pyramid, each brick is the sum of the two bricks directly beneath it. Find the three missing totals.

[ ]

[2.7]

[4.6]

[3.4]

10.A bank account is overdrawn by $38.75. The account holder deposits $95.00, withdraws $28.60, deposits another $42.35 and then pays a $4.50 account fee. What is the balance after these transactions?

11.Explain why changing the order of two addends does not change their sum. Include a numerical example.