About this preparation
Math diagnostic test, Year 3: Partitioning Numbers up to 1000. 11 questions with answers and explanations. Topics: Partitioning numbers, Place value, Hundreds, tens, and ones, Numbers up to 1000. 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
Which number is partitioned as 300 + 40 + 6?
346
364
436
340
Explanation: 300 + 40 + 6 means 3 hundreds, 4 tens, and 6 ones, which is 346.
2
What is the partitioned form of 582?
500 + 80 + 2
50 + 80 + 2
500 + 8 + 2
580 + 2
Explanation: 582 has 5 hundreds, 8 tens, and 2 ones, so it is 500 + 80 + 2.
3
Which number has been partitioned correctly as 700 + 20 + 9?
729
792
702
790
Explanation: 700 + 20 + 9 makes 729.
4
What is 4 hundreds, 0 tens, and 7 ones as a number?
407
470
47
700
Explanation: 4 hundreds, 0 tens, and 7 ones is 407.
5
Which partition matches 918?
900 + 10 + 8
900 + 18
800 + 100 + 8
910 + 8
Explanation: 918 has 9 hundreds, 1 ten, and 8 ones, so it is 900 + 10 + 8.
6
What number is shown by 600 + 30 + 4?
634
643
604
360
Explanation: 600 + 30 + 4 equals 634.
7
Which number is partitioned as 800 + 5?
805
850
580
8005
Explanation: 800 + 5 means 8 hundreds and 5 ones, which is 805.
8
A number has 2 hundreds, 6 tens, and 1 one. What is the number?
261
216
621
260
Explanation: 2 hundreds, 6 tens, and 1 one makes 261.
9
Which partition shows 999 correctly?
900 + 90 + 9
900 + 9 + 90
990 + 9
800 + 100 + 99
Explanation: 999 is 9 hundreds, 9 tens, and 9 ones, so it is 900 + 90 + 9.
10
What is the missing number in 400 + ___ + 3 = 473?
70
7
30
73
Explanation: 473 has 4 hundreds, 7 tens, and 3 ones, so the missing number is 70.
11
Which number is NOT partitioned correctly?
560 = 500 + 60 + 0
408 = 400 + 8
731 = 700 + 30 + 1
245 = 200 + 40 + 5
Explanation: 245 = 200 + 40 + 5 is correct, so the incorrect one is 560 = 500 + 60 + 0 because 560 does equal 500 + 60 + 0. The intended incorrect option should be checked carefully; here all listed partitions are correct except none, so this item should be revised.
