Place Value: Tens and Ones — Answer Key
Part A: Sort the Words
Sort each word or number into the correct category box.
1. Sort each number into the correct category.
Odd Ones Digit
554177 Even Ones Digit
326824 Look at the last digit of each number. The numbers 55, 41, and 77 end in 5, 1, and 7 (odd), while 32, 68, and 24 end in 2, 8, and 4 (even).
Part B: Fill in the Blank
Write the missing word or number on each line.
1. The number 48 has 4 tens.
In 48, the digit on the left (4) is in the tens place, so the number contains 4 tens (which equals 40).
2. 67 = 60 + 7.
The expanded form of 67 splits it into 6 tens (60) and 7 ones, so 60 plus 7 equals 67.
3. The ones digit in 53 is 3.
The ones digit is always the rightmost digit of a number. In 53, the digit on the far right is 3.
4. 5 tens and 9 ones = 59.
Five tens equal 50 and nine ones equal 9. Adding 50 plus 9 gives us 59.
5. 71 = 7 tens and 1 one.
The tens digit in 71 is 7, which means the number contains 7 groups of ten plus 1 extra one.
Part C: True or False?
Read each statement. Circle True or False.
1. The number 86 has 8 tens and 6 ones.
True False
True, because the 8 is in the tens place (worth 80) and the 6 is in the ones place, giving 80 plus 6 equals 86.
2. The digit 3 in 39 stands for 30.
True False
True — the 3 sits in the tens place, so it represents 3 groups of ten, which is 30.
3. 50 + 2 = 25.
True False
False — adding 50 and 2 gives 52, not 25. The digits 5 and 2 were flipped in the wrong answer.
4. The number 14 has 4 tens and 1 one.
True False
False — in 14 the 1 is in the tens place and the 4 is in the ones place, so it has 1 ten and 4 ones.