This grade 1 place worksheet answer key solves all 23 problems of the tens and ones worksheet step by step.
This answer key shows every step for the 23 tens and ones problems. Check each answer with cubes or a drawing. Look at the tens first, then the ones, and talk about any mistakes together.
Grade 1 Place Worksheet Answer Key: problems 1–5
Problem 1: Ten ones make a ten
Count the cubes: there are 10 ones. Bundle them into one rod.
10 ones make 1 ten.
Problem 2: Ones in a ten
10 ones make one bundle.
\(10\) ones \(=\) 1 ten.
Problem 3: Count the rods
There are 3 rods. Each rod is 1 ten. So there are 3 tens.
3 tens and 0 ones is 30.
Problem 4: Ten frames show a teen
The full frame is 1 ten. The other frame has 2 counters, so 2 ones.
\(10 + 2 = 12\). The number is 12.
Problem 5: Ten and some ones
Start at 10 and add 6 ones: \(10 + 6 = 16\).
The number is 16.
Grade 1 Place Worksheet Answer Key: problems 6–10
Problem 6: Write the teen number
1 ten is 10. Add 8 ones: \(10 + 8 = 18\).
The number is 18.
Problem 7: Split a teen
15 is \(10 + 5\).
It has 1 ten and 5 ones.
Problem 8: Count the blocks
Count the rods: 2 tens. Count the cubes: 4 ones.
The number is 24.
Problem 9: More blocks
There are 5 rods, so 5 tens. There are 7 cubes, so 7 ones.
The number is 57.
Problem 10: Tens and ones to a number
6 tens is 60. Add 2 ones: \(60 + 2 = 62\).
The number is 62.
Grade 1 Place Worksheet Answer Key: problems 11–15
Problem 11: Tens digit
In 74, the left digit is 7. The left digit shows the tens.
The digit is 7. It means 7 tens.
Problem 12: Ones digit
In 38, the right digit is 8. The right digit shows the ones.
The digit is 8. It means 8 ones.
Problem 13: Fill the place value chart
The tens column shows 4. The ones column shows 9.
4 tens and 9 ones is 49.
Problem 14: Whole tens
There are 5 rods and no cubes. That is 5 tens and 0 ones.
The number is 50.
Problem 15: Count by tens
Count 1 ten more each time: 10, 20, 30, 40, 50, 60.
The missing numbers are 30 and 50.
Grade 1 Place Worksheet Answer Key: problems 16–20
Problem 16: Zero ones
7 tens is 70. There are no ones to add.
The number is 70.
Problem 17: Tens and ones as a sum
The 8 in 83 is 8 tens, which is 80. The 3 is 3 ones.
\(83 = 80 + 3\). The missing numbers are 80 and 3.
Problem 18: Is Maya right?
In 41, the 4 is on the left, so it means 4 tens. The 1 means 1 one.
Maya is not right. 41 is 4 tens and 1 one.
Problem 19: Marble bags
3 bags of ten is 3 tens, which is 30. Add 5 loose marbles.
\(30 + 5 = 35\). Diego has 35 marbles.
Problem 20: Sticker sheets
47 is 4 tens and 7 ones.
Priya has 4 full sheets and 7 loose stickers.
Grade 1 Place Worksheet Answer Key: problems 21–23
Problem 21: Crayon boxes
6 boxes of ten is 60. Add 9 more crayons.
\(60 + 9 = 69\). Liam has 69 crayons.
Problem 22: Bead bags
9 bags of ten is 9 tens, which is 90.
Aisha has 90 beads. The number 90 has 0 ones.
Problem 23: Trade ones for a ten
10 ones make 1 ten. Take away 10 ones from 13 ones: 3 ones are left. Add 1 ten to 2 tens: 3 tens.
Ethan has 3 tens and 3 ones. The number is 33.
Check: \(20 + 13 = 33\).
How to use this grade 1 place worksheet answer key
Read this grade 1 place worksheet answer key after trying each problem yourself, and redo any problem you missed.
See every chapter on the Grade 1 math page.