Place Value: Tens and Ones — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. 48 is less than 84.
48 has 4 tens, while 84 has 8 tens. Since 4 tens is less than 8 tens, 48 is less than 84.
2. The number with 6 tens and 2 ones is 62.
6 tens equal 60 and 2 ones equal 2. Adding them gives 60 + 2 = 62.
3. 55 = 55.
55 and 55 are the same number, so they are equal. The correct symbol is =.
4. 73 is greater than 37.
73 has 7 tens, while 37 has 3 tens. Since 7 tens is more than 3 tens, 73 is greater than 37.
5. 90 + 6 = 96.
96 = 90 + 6. The missing ones value is 6.
6. The biggest two-digit number with 4 tens is 49.
A number with 4 tens is between 40 and 49. The biggest ones digit is 9, so the answer is 49.
7. 75 = 7 tens and 5 ones.
7 tens equal 70 and 5 ones equal 5. Adding them gives 70 + 5 = 75.
8. The value of the digit 3 in 31 is 30.
The digit 3 is in the tens place in 31, so its value is 3 × 10 = 30.
9. 5 tens and 8 ones is less than 6 tens and 1 one.
5 tens and 8 ones = 58, and 6 tens and 1 one = 61. Since 58 is smaller than 61, 58 is less than 61.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
87
→ 8 tens and 7 ones
4 tens and 3 ones
43
→ 4 tens and 3 ones
1 ten and 9 ones
60
→ 6 tens and 0 ones
8 tens and 7 ones
19
→ 1 ten and 9 ones
6 tens and 0 ones
Each two-digit number can be broken into tens and ones. 87 = 8 tens and 7 ones, 43 = 4 tens and 3 ones, 60 = 6 tens and 0 ones, and 19 = 1 ten and 9 ones.