Numbers to 100: tens and ones

Recognise place value in 2-digit numbers up to 100

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Try each question. If you're stuck, leave it and come back. The answer key is on the last page.

1
How many tens are in 42? 42 has ___ tens.
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2
How many ones are in 42? 42 has ___ ones.
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3
What number has 4 tens and 5 ones? A) 54 B) 45 C) 405 D) 9
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4
What number has 8 tens and 0 ones? 8 tens and 0 ones = ___
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5
True or false? The number 67 has 6 tens and 7 ones. A) True B) False
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6
Which number is one more than 39? A) 38 B) 40 C) 30 D) 49
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7
Put these numbers in order from smallest to largest. Put these in order: 73, 37, 57, 27
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8
What is 100? 100 has ___ tens
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9
What is 10 less than 62? 62 - 10 = ___
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10
What number is shown by 8 tens and 4 ones? A) 84 B) 48 C) 82 D) 88
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Answer key

Numbers to 100: tens and ones · for parents and teachers

1
4
42 = 4 tens and 2 ones. The first digit shows the tens.
2
2
42 = 4 tens and 2 ones. The last digit shows the ones.
3
45
4 tens = 40 and 5 ones = 5. So the number is 45.
4
80
8 tens = 80. With 0 ones, the number is just 80.
5
True
67 has 6 in the tens place and 7 in the ones place. So this is true.
6
40
39 + 1 = 40. The next number after 39 is 40.
7
27, 37, 57, 73
27 < 37 < 57 < 73. Compare the tens column to put them in order.
8
10
100 has 10 tens.
9
52
62 - 10 = 52.
10
84
8 tens + 4 ones = 84.