Step-by-step Maths Level 2: Counting forwards to 100
Part of the Step-by-step Maths Level 2 counting to 100 chapter. Chapter overview · whole chapter on one page
Counting forwards to 100
We count forwards one number at a time. Each number is one more than the number before.
To find the number after, add one. Go to the next number on the count.
Key ideas
- Counting forwards means each number is one more.
- The number after 39 is 40.
- Count to 100 and stop there.
Method. The number after is the next number when we count on one.
- Start at the number. We begin where we are.47
- Count on one. The next number is one more.47 + 1 = 48
- Write the answer. 48
Check. Count back one from 48: you reach 47. It works.
Watch out. The number after is one bigger, not the same number again.
Method. The number after is the next number when we count on one.
- Start at the number. We begin where we are.69
- Count on one. The next number is one more.69 + 1 = 70
- Write the answer. 70
Check. Count back one from 70: you reach 69. It works.
Watch out. The number after is one bigger, not the same number again.
Method. The number after is the next number when we count on one.
- Start at the number. We begin where we are.99
- Count on one. The next number is one more.99 + 1 = 100
- Write the answer. 100
Check. Count back one from 100: you reach 99. It works.
Watch out. The number after is one bigger, not the same number again.
Watch out
Watch out. Thirty and forty are not the same. After 39 comes 40, not 30.
Exam tip
Grown-up tip. Count forwards from 0 to 100 in tens, then ones. Aim for a count without stopping. Ask: “What comes after 59?”
Exercise 1A Practice: the number after
Non-calculatorMethod. The number after is the next number when we count on one.
- Start at the number. We begin where we are.94
- Count on one. The next number is one more.94 + 1 = 95
- Write the answer. 95
Check. Count back one from 95: you reach 94. It works.
Watch out. The number after is one bigger, not the same number again.
Method. The number after is the next number when we count on one.
- Start at the number. We begin where we are.41
- Count on one. The next number is one more.41 + 1 = 42
- Write the answer. 42
Check. Count back one from 42: you reach 41. It works.
Watch out. The number after is one bigger, not the same number again.
Method. The number after is the next number when we count on one.
- Start at the number. We begin where we are.38
- Count on one. The next number is one more.38 + 1 = 39
- Write the answer. 39
Check. Count back one from 39: you reach 38. It works.
Watch out. The number after is one bigger, not the same number again.
Method. The number after is the next number when we count on one.
- Start at the number. We begin where we are.72
- Count on one. The next number is one more.72 + 1 = 73
- Write the answer. 73
Check. Count back one from 73: you reach 72. It works.
Watch out. The number after is one bigger, not the same number again.
Method. The number after is the next number when we count on one.
- Start at the number. We begin where we are.43
- Count on one. The next number is one more.43 + 1 = 44
- Write the answer. 44
Check. Count back one from 44: you reach 43. It works.
Watch out. The number after is one bigger, not the same number again.
Method. The number after is the next number when we count on one.
- Start at the number. We begin where we are.51
- Count on one. The next number is one more.51 + 1 = 52
- Write the answer. 52
Check. Count back one from 52: you reach 51. It works.
Watch out. The number after is one bigger, not the same number again.
Method. The number after is the next number when we count on one.
- Start at the number. We begin where we are.2
- Count on one. The next number is one more.2 + 1 = 3
- Write the answer. 3
Check. Count back one from 3: you reach 2. It works.
Watch out. The number after is one bigger, not the same number again.
Method. The number after is the next number when we count on one.
- Start at the number. We begin where we are.58
- Count on one. The next number is one more.58 + 1 = 59
- Write the answer. 59
Check. Count back one from 59: you reach 58. It works.
Watch out. The number after is one bigger, not the same number again.
Method. The number after is the next number when we count on one.
- Start at the number. We begin where we are.57
- Count on one. The next number is one more.57 + 1 = 58
- Write the answer. 58
Check. Count back one from 58: you reach 57. It works.
Watch out. The number after is one bigger, not the same number again.
Method. The number after is the next number when we count on one.
- Start at the number. We begin where we are.93
- Count on one. The next number is one more.93 + 1 = 94
- Write the answer. 94
Check. Count back one from 94: you reach 93. It works.
Watch out. The number after is one bigger, not the same number again.
Method. The number after is the next number when we count on one.
- Start at the number. We begin where we are.32
- Count on one. The next number is one more.32 + 1 = 33
- Write the answer. 33
Check. Count back one from 33: you reach 32. It works.
Watch out. The number after is one bigger, not the same number again.
Method. The number after is the next number when we count on one.
- Start at the number. We begin where we are.5
- Count on one. The next number is one more.5 + 1 = 6
- Write the answer. 6
Check. Count back one from 6: you reach 5. It works.
Watch out. The number after is one bigger, not the same number again.
Method. The number after is the next number when we count on one.
- Start at the number. We begin where we are.0
- Count on one. The next number is one more.0 + 1 = 1
- Write the answer. 1
Check. Count back one from 1: you reach 0. It works.
Watch out. The number after is one bigger, not the same number again.
Method. The number after is the next number when we count on one.
- Start at the number. We begin where we are.4
- Count on one. The next number is one more.4 + 1 = 5
- Write the answer. 5
Check. Count back one from 5: you reach 4. It works.
Watch out. The number after is one bigger, not the same number again.
Method. The number after is the next number when we count on one.
- Start at the number. We begin where we are.77
- Count on one. The next number is one more.77 + 1 = 78
- Write the answer. 78
Check. Count back one from 78: you reach 77. It works.
Watch out. The number after is one bigger, not the same number again.
Method. Count on from 39 one step at a time.
- Start at 39. It is the number we begin with.39
- Count on one. The number after 39 is 40, not 30.39 + 1 = 40
- Compare with Sam. Thirty is before 39, not after it.No, 40
Check. Count back from 40 one step: 40, 39. That is correct.
Watch out. Thirty comes before 39, so it cannot come after it.