Step-by-step Maths Level 2 Counting to 100: check-up and practice test questions

Method. Start at the number and count on in steps.

1. Start at the first number. It is where we begin.
   43
2. Count on by 6. Say each new number as we go.
   43 + 6 = 49
3. Write the answer. This is the last number we said.
   49

Check. Count back 6 from 49 to check. You arrive at 43.

Watch out. Count on from the number you start with, do not start again from zero.

Method. Start at the number and count back in steps.

1. Start at the first number. It is where we begin.
   97
2. Count back by 3. Say each number we pass.
   97 - 3 = 94
3. Write the answer. This is the last number we said.
   94

Check. Count on 3 from 94 to check. You arrive at 97.

Watch out. Count back from the number you start with. Do not count the starting number again.

Method. Start at the number and count on in steps.

1. Start at the first number. It is where we begin.
   90
2. Count on by 7. Say each new number as we go.
   90 + 7 = 97
3. Write the answer. This is the last number we said.
   97

Check. Count back 7 from 97 to check. You arrive at 90.

Watch out. Count on from the number you start with, do not start again from zero.

Method. The numbers go up in steps of 2. Find the step first.

1. Find the step. Each number is 2 more than the one before.
   48, 50, 52
2. Count on in steps to fill the gaps. Add the step to the number before each gap.
   48, 50, 52, 54, 56
3. Write the missing numbers.
   50 and 54

Check. Check the whole row: 48, 50, 52, 54, 56. Each step is 2.

Watch out. Do not count in ones. Count in steps of 2.

Method. The numbers go up in steps of 2. Find the step first.

1. Find the step. Each number is 2 more than the one before.
   2, 4, 6
2. Count on in steps to fill the gaps. Add the step to the number before each gap.
   2, 4, 6, 8, 10
3. Write the missing numbers.
   2 and 6

Check. Check the whole row: 2, 4, 6, 8, 10. Each step is 2.

Watch out. Do not count in ones. Count in steps of 2.

Method. The number before is the number we say just before this one.

1. Start at the number. We begin where we are.
   85
2. Count back one. The number before is one less.
   85 - 1 = 84
3. Write the answer.
   84

Check. Count on one from 84: you reach 85. It works.

Watch out. The number before is one less. Do not say the same number.

Method. The number before is the number we say just before this one.

1. Start at the number. We begin where we are.
   86
2. Count back one. The number before is one less.
   86 - 1 = 85
3. Write the answer.
   85

Check. Count on one from 85: you reach 86. It works.

Watch out. The number before is one less. Do not say the same number.

Method. The number before is the number we say just before this one.

1. Start at the number. We begin where we are.
   66
2. Count back one. The number before is one less.
   66 - 1 = 65
3. Write the answer.
   65

Check. Count on one from 65: you reach 66. It works.

Watch out. The number before is one less. Do not say the same number.

Method. The numbers go up in steps of 2. Find the step first.

1. Find the step. Each number is 2 more than the one before.
   12, 14, 16
2. Count on in steps to fill the gaps. Add the step to the number before each gap.
   12, 14, 16, 18, 20
3. Write the missing numbers.
   16 and 20

Check. Check the whole row: 12, 14, 16, 18, 20. Each step is 2.

Watch out. Do not count in ones. Count in steps of 2.

Method. Say the tens part, then the ones part.

1. Find the tens part. The tens digit gives the tens word.
   9 tens = ninety
2. Find the ones part. The ones digit gives the last word.
   2 ones: two ones
3. Write the name. Put a hyphen between the tens word and the ones word.
   ninety-two

Check. Read the name back: ninety-two is 92.

Watch out. Use a hyphen between tens and ones, for example forty-six.

Method. The numbers go up in steps of 10. Find the step first.

1. Find the step. Each number is 10 more than the one before.
   30, 40, 50
2. Count on in steps to fill the gaps. Add the step to the number before each gap.
   30, 40, 50, 60, 70
3. Write the missing numbers.
   30 and 50

Check. Check the whole row: 30, 40, 50, 60, 70. Each step is 10.

Watch out. Do not count in ones. Count in steps of 10.

Method. The number after is the next number when we count on one.

1. Start at the number. We begin where we are.
   59
2. Count on one. The next number is one more.
   59 + 1 = 60
3. Write the answer.
   60

Check. Count back one from 60: you reach 59. It works.

Watch out. The number after is one bigger, not the same number again.

Method. The numbers go up in steps of 5. Find the step first.

1. Find the step. Each number is 5 more than the one before.
   75, 80, 85
2. Count on in steps to fill the gaps. Add the step to the number before each gap.
   75, 80, 85, 90, 95
3. Write the missing numbers.
   80 and 90

Check. Check the whole row: 75, 80, 85, 90, 95. Each step is 5.

Watch out. Do not count in ones. Count in steps of 5.

Method. Start at the number and count back in steps.

1. Start at the first number. It is where we begin.
   92
2. Count back by 3. Say each number we pass.
   92 - 3 = 89
3. Write the answer. This is the last number we said.
   89

Check. Count on 3 from 89 to check. You arrive at 92.

Watch out. Count back from the number you start with. Do not count the starting number again.

Method. Start at the number and count back in steps.

1. Start at the first number. It is where we begin.
   67
2. Count back by 3. Say each number we pass.
   67 - 3 = 64
3. Write the answer. This is the last number we said.
   64

Check. Count on 3 from 64 to check. You arrive at 67.

Watch out. Count back from the number you start with. Do not count the starting number again.

Method. The number before is the number we say just before this one.

1. Start at the number. We begin where we are.
   33
2. Count back one. The number before is one less.
   33 - 1 = 32
3. Write the answer.
   32

Check. Count on one from 32: you reach 33. It works.

Watch out. The number before is one less. Do not say the same number.

Method. The number before is the number we say just before this one.

1. Start at the number. We begin where we are.
   95
2. Count back one. The number before is one less.
   95 - 1 = 94
3. Write the answer.
   94

Check. Count on one from 94: you reach 95. It works.

Watch out. The number before is one less. Do not say the same number.

Method. Find the tens first, then the ones.

1. Find the tens word. The tens word tells us how many tens.
   ninety = 9 tens
2. Find the ones word. The ones word tells us the ones digit.
   nine = 9
3. Write the numeral. Tens digit first, then ones digit.
   99

Check. Say 99 as a number name to check: ninety-nine.

Watch out. Write the tens digit first. Seventy-four is 74, not 47.

Method. Find the tens first, then the ones.

1. Find the tens word. The tens word tells us how many tens.
   seventy = 7 tens
2. Find the ones word. The ones word tells us the ones digit.
   seven = 7
3. Write the numeral. Tens digit first, then ones digit.
   77

Check. Say 77 as a number name to check: seventy-seven.

Watch out. Write the tens digit first. Seventy-four is 74, not 47.

Method. Start at the number and count on in steps.

1. Start at the first number. It is where we begin.
   79
2. Count on by 7. Say each new number as we go.
   79 + 7 = 86
3. Write the answer. This is the last number we said.
   86

Check. Count back 7 from 86 to check. You arrive at 79.

Watch out. Count on from the number you start with, do not start again from zero.