About this preparation
Math diagnostic test, Grade 3: Addition and subtraction within 1000. 11 questions with answers and explanations. Topics: Addition and subtraction within 1000, Multiplication and division basics, Place value, Word problems, Fractions, 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 + 128?
465
475
485
495
Explanation: Add hundreds, tens, and ones: 300 + 100 = 400, 40 + 20 = 60, 7 + 8 = 15. Then 400 + 60 + 15 = 475.
2
What is 600 - 275?
325
335
425
225
Explanation: Subtract step by step: 600 - 200 = 400, then 400 - 70 = 330, then 330 - 5 = 325.
3
Which number has 5 hundreds, 2 tens, and 9 ones?
529
592
259
509
Explanation: 5 hundreds = 500, 2 tens = 20, and 9 ones = 9. Together they make 529.
4
What is 6 × 4?
10
18
24
28
Explanation: Multiplication means equal groups. 6 groups of 4 equals 24.
5
Which equation shows 24 shared equally into 6 groups?
24 + 6 = 30
24 - 6 = 18
24 ÷ 6 = 4
6 × 24 = 144
Explanation: Sharing equally is division. 24 divided by 6 equals 4.
6
A pencil costs 7 cents. How much do 5 pencils cost?
12 cents
25 cents
35 cents
50 cents
Explanation: Multiply the cost of one pencil by 5: 7 × 5 = 35.
7
Which fraction shows one half?
1/2
1/3
2/3
3/4
Explanation: One half means 1 out of 2 equal parts, written as 1/2.
8
What time is 30 minutes after 2:15?
2:30
2:45
3:00
3:15
Explanation: Add 30 minutes to 2:15. That gives 2:45.
9
Mia has 18 stickers. She gives 7 away. How many stickers does she have left?
9
10
11
12
Explanation: This is a subtraction problem: 18 - 7 = 11.
10
Which number is greatest?
408
480
408
448
Explanation: Compare the hundreds, then tens. 480 is greater than 448 and 408.
11
A rectangle has a length of 5 cm and a width of 3 cm. What is its perimeter?
8 cm
15 cm
16 cm
30 cm
Explanation: Perimeter means add all sides: 5 + 3 + 5 + 3 = 16 cm.
