Place Value Tens/Ones

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Answer Key & Explanations

Place Value Tens/Ones · Grade 1 · Worksheet 3

1. Expand 61: __ tens + __ ones Answer: 6 tens + 1 ones Solution: Look at the number 61. Step 2: The first digit is 6, which means there are 6 tens. Step 3: The second digit is 1, which means there is 1 one.
   Full step-by-step solution

   Step 1: Look at the number 61. Step 2: The first digit is 6, which means there are 6 tens. Step 3: The second digit is 1, which means there is 1 one. Step 4: So, 61 expands to 6 tens + 1 ones.

2. A farmer has 7 baskets with 10 apples in each basket. He also has 6 extra apples. How many apples does the farmer have in total? Answer: 76 Solution: First, find how many apples are in the baskets. There are 7 baskets with 10 apples each, so 7 × 10 = 70 apples. Now add the extra apples.
   Full step-by-step solution

   Step 1: First, find how many apples are in the baskets. There are 7 baskets with 10 apples each, so 7 × 10 = 70 apples. Step 2: Now add the extra apples. The farmer has 70 apples from the baskets plus 6 extra apples. Step 3: 70 + 6 = 76 The answer is 76.

3. Mason is building towers with blocks. He has 9 towers with 10 blocks in each tower, and 3 extra blocks on the floor. How many blocks does Mason have in total? Answer: 93 Solution: Count the blocks in the towers. There are 9 towers with 10 blocks each. 9 groups of 10 is 90 blocks.
   Full step-by-step solution

   Step 1: Count the blocks in the towers. There are 9 towers with 10 blocks each. 9 groups of 10 is 90 blocks. Step 2: Count the extra blocks on the floor. There are 3 extra blocks. Step 3: Add the blocks from the towers and the extra blocks together: 90 + 3 = 93. Mason has 93 blocks in total.

4. How many tens are in 91? Answer: 9 Solution: Identify the tens digit in 91. The number 91 has a 9 in the tens place. This means there are 9 tens in 91.
   Full step-by-step solution

   Step 1: Identify the tens digit in 91. Step 2: The number 91 has a 9 in the tens place. Step 3: This means there are 9 tens in 91. The answer is 9.

5. Emma has 3 boxes of crayons. Each box has 10 crayons. How many crayons does Emma have in total? Answer: 30 Solution: Emma has 3 boxes of crayons. Each box contains 10 crayons. We need to find the total number of crayons.
   Full step-by-step solution

   Step 1: Understand the problem. Emma has 3 boxes of crayons. Each box contains 10 crayons. We need to find the total number of crayons. Step 2: Identify the operation. Since each box has the same number of crayons, we can use multiplication to find the total. Total crayons = number of boxes × crayons per box. Step 3: Perform the multiplication. Number of boxes = 3 Crayons per box = 10 Total crayons = 3 × 10 Step 4: Calculate. 3 × 10 = 30 Step 5: State the final answer. Emma has 30 crayons in total.

6. Expand 76: __ tens + __ ones Answer: 7 tens + 6 ones Solution: Look at the number 76. Step 2: The first digit is 7, which means there are 7 tens. Step 3: The second digit is 6, which means there are 6 ones.
   Full step-by-step solution

   Step 1: Look at the number 76. Step 2: The first digit is 7, which means there are 7 tens. Step 3: The second digit is 6, which means there are 6 ones. Step 4: So, 76 expands to 7 tens + 6 ones.

7. Liam is counting his toy cars. He has 5 groups of 10 cars and 7 single cars. How many toy cars does Liam have in total? Answer: 57 Solution: Count the cars in groups of ten: 5 groups × 10 cars = 50 cars Count the single cars: 7 cars Add them together: 50 + 7 = 57 Liam has 57 toy cars in total.
   Full step-by-step solution

   Step 1: Count the cars in groups of ten: 5 groups × 10 cars = 50 cars Step 2: Count the single cars: 7 cars Step 3: Add them together: 50 + 7 = 57 Liam has 57 toy cars in total.

8. How many tens and ones are in 91? Answer: 9 tens and 1 one Solution: Look at the number 91. The first digit is 9, which means there are 9 tens. The second digit is 1, which means there is 1 one.
   Full step-by-step solution

   Step 1: Look at the number 91. Step 2: The first digit is 9, which means there are 9 tens. Step 3: The second digit is 1, which means there is 1 one. Step 4: So, 91 has 9 tens and 1 one.

9. Kaia sees a number built with base ten blocks. There are 3 tens rods and 5 ones cubes. What number is Kaia looking at? Answer: 35 Solution: Count the tens rods. There are 3 tens rods. 3 tens = 30.
   Full step-by-step solution

   Step 1: Count the tens rods. There are 3 tens rods. 3 tens = 30. Step 2: Count the ones cubes. There are 5 ones cubes. 5 ones = 5. Step 3: Add the tens and ones together: 30 + 5 = 35. The number Kaia is looking at is 35.

10. Ava is looking at a place value chart. The chart shows 1 ten rod and 6 ones cubes. What number is shown in the chart? Answer: 16 Solution: Count the tens rods. There is 1 ten rod. 1 ten equals 10.
    Full step-by-step solution

    Step 1: Count the tens rods. There is 1 ten rod. 1 ten equals 10. Step 2: Count the ones cubes. There are 6 ones cubes. 6 ones equals 6. Step 3: Add the tens and ones together: 10 + 6 = 16. The number shown is 16.