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Grade 3 Math Diagnostic Test

20 questions • Ontario curriculum • About 30–40 minutes • No calculator
Student name:
Date:
Score:   / 20
For parents: have your child work through this on their own, without help. Circle one letter for multiple-choice questions and show work in the boxes. Then check the answer key — any section with 2+ wrong answers is worth working on together.
Answer key (parents) ← All diagnostics
1
What is 345 + 278?
A 613
B 623
C 523
D 633
2
700 − 256 = ?
Answer:
3
6 × 7 = ?
A 42
B 48
C 36
D 54
4
56 ÷ 8 = ?
A 6
B 7
C 8
D 9
5
Which number is the greatest?
A 489
B 498
C 484
D 494
6
Round 367 to the nearest ten.
Answer:
7
What is 1/2 of 14?
A 6
B 7
C 8
D 12
8
Write the fraction for 3 out of 4 equal parts.
Answer:
9
How many sides does a hexagon have?
A 5
B 6
C 7
D 8
10
Find the perimeter of a square with side 6 cm.
Answer:
11
9 × 5 = ?
A 40
B 45
C 50
D 54
12
36 ÷ 4 = ?
Answer:
13
Which of these is an even number?
A 37
B 42
C 51
D 63
14
Continue the pattern: 5, 10, 15, 20, __
Answer:
15
How many minutes are in 1 hour?
A 60
B 100
C 30
D 90
16
456 + 134 = ?
Answer:
17
7 × 3 = ?
A 18
B 21
C 24
D 28
18
There are 24 apples. 4 friends share them equally. How many apples does each friend get?
Answer:
19
Which fraction is the largest?
A 1/4
B 1/2
C 1/8
D 1/3
20
803 − 379 = ?
Answer:
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