Place Value (Tens and Ones) — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. The number 29 has 9 ones.
In 29, the digit 9 on the right is the ones digit, so the number has 9 ones.
2. 6 tens and 1 one is the same as 61.
6 tens equals 60 and 1 one equals 1, so 60 + 1 = 61 — 6 goes in the tens place and 1 in the ones place.
3. The expanded form of 84 is 80 + 4.
In 84, the tens digit 8 is worth 80 and the ones digit 4 is worth 4, so the expanded form is 80 + 4.
4. 7 tens and 6 ones make 76.
To build 76, we need 7 tens because 7 tens is 70, and 70 + 6 = 76.
5. The digit 5 in 51 is in the tens place.
In 51, the 5 is on the left side, which is the tens place, so the 5 is worth 50.
6. The number 93 has 9 tens.
In 93, the digit 9 sits in the tens place, so the number has 9 tens worth 90.
7. 20 + 8 = 28.
20 is 2 tens and 8 is 8 ones, so combining them builds the number 28.
8. The value of the 3 in 36 is 30.
The 3 in 36 sits in the tens place, so its value is 3 tens, which equals 30.
9. 4 tens and 4 ones make 44.
To make 44, the tens digit must be 4 because 4 tens is 40, and 40 + 4 = 44.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
58
→ 5 tens 8 ones
5 tens 8 ones
71
→ 7 tens 1 one
7 tens 1 one
23
→ 2 tens 3 ones
2 tens 3 ones
90
→ 9 tens 0 ones
9 tens 0 ones
The tens digit of each number tells how many tens and the ones digit tells how many ones — so 58 breaks into 5 tens and 8 ones, 71 into 7 and 1, 23 into 2 and 3, and 90 has 9 tens with 0 ones.