Place Value: Tens and Ones — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. Which list shows the numbers in order from least to greatest?
A) 54, 45, 72
B) 45, 54, 72
C) 72, 54, 45
D) 45, 72, 54
45 has 4 tens, 54 has 5 tens, and 72 has 7 tens. In order from least to greatest: 45, 54, 72.
2. The number 67 is between which two numbers?
A) 57 and 60
B) 60 and 65
C) 65 and 70
D) 70 and 75
67 is greater than 65 and less than 70, so it falls between 65 and 70.
3. If you change the tens digit of 38 to a 7, what number do you get?
A) 73
B) 37
C) 87
D) 78
38 has a tens digit of 3 and a ones digit of 8. Changing the tens digit to 7 gives 78.
4. Which number has more ones than tens?
A) 41
B) 82
C) 29
D) 70
In 29, the ones digit is 9 and the tens digit is 2. Since 9 is more than 2, this number has more ones than tens.
Part B: Fill in the Blank
Write the correct answer on each line.
1. The number just after 79 is 80.
When counting, the number that comes right after 79 is 80.
2. 44 = 40 + 4.
In expanded form, 44 is broken into 40 (4 tens) and 4 (4 ones). So 44 = 40 + 4.
3. A number with 0 ones and 5 tens is 50.
5 tens equal 50 and 0 ones equal 0. Adding them gives 50 + 0 = 50.
4. The number just before 60 is 59.
When counting, the number that comes right before 60 is 59.
5. 90 + 3 = 93.
93 = 90 + 3. The missing tens value is 90.