About this preparation
Math diagnostic test, Grade 3: Addition and subtraction within 1,000. 10 questions with answers and explanations. Topics: Addition and subtraction within 1,000, Multiplication and division basics, Place value, Word problems, Measurement and time. Duration: 55 min.
Diagnostic tasks
Below is the full list of tasks with correct answers and explanations. In a lesson the tutor can hide the answers and reveal them after the student tries.
1
What is 347 + 126?
463
473
483
373
Explanation: Add the ones, tens, and hundreds: 7 + 6 = 13, 4 + 2 + 1 = 7, and 3 + 1 = 4. The sum is 473.
2
What is 800 - 275?
525
535
625
425
Explanation: Subtract 200, then 70, then 5: 800 - 200 = 600, 600 - 70 = 530, 530 - 5 = 525.
3
Which number has 6 hundreds, 2 tens, and 9 ones?
629
692
6290
269
Explanation: 6 hundreds means 600, 2 tens means 20, and 9 ones means 9. Together they make 629.
4
What is 4 × 7?
11
21
28
32
Explanation: 4 groups of 7 equals 28.
5
Which equation shows 24 divided into 6 equal groups?
24 ÷ 6 = 4
24 ÷ 4 = 6
24 + 6 = 30
24 - 6 = 18
Explanation: Dividing 24 into 6 equal groups gives 4 in each group.
6
Mia has 18 stickers. She gives 5 stickers to a friend. How many stickers does she have left?
12
13
14
23
Explanation: Subtract the stickers given away: 18 - 5 = 13.
7
A pencil is 15 centimeters long. Which is the best estimate for the length of a small book?
2 centimeters
20 centimeters
200 centimeters
2 meters
Explanation: A small book is usually longer than a pencil, and 20 centimeters is a reasonable estimate.
8
What time is 30 minutes after 2:15?
2:35
2:45
2:30
2:15
Explanation: Adding 30 minutes to 2:15 gives 2:45.
9
Which number is greater?
508
580
5080
58
Explanation: 580 is greater than 508 because it has more tens.
10
A box has 3 rows of 5 apples. How many apples are in the box?
8
15
10
20
Explanation: 3 rows of 5 means 3 × 5 = 15.
