Step-by-step Maths Level 1 Taking away within 10: check-up and practice test questions

Method. Take away the second number from the first. Count back to check.

1. Start with the first number. It is the number of things we begin with.
   2
2. Take away 1. Cross out or count back this many.
   2 - 1
3. Write the answer. This is how many are left.
   1

Check. Add back: 1 + 1 = 2. The answer is right.

Watch out. Count back from the first number, not up from the second.

Method. Take away the second number from the first. Count back to check.

1. Start with the first number. It is the number of things we begin with.
   7
2. Take away 3. Cross out or count back this many.
   7 - 3
3. Write the answer. This is how many are left.
   4

Check. Add back: 4 + 3 = 7. The answer is right.

Watch out. Count back from the first number, not up from the second.

Method. Count the things that are not crossed out.

1. Count the whole group. There are this many to start.
   3
2. Take away the crossed-out ones. Cross out 1 and take them away.
   3 - 1 = 2
3. Count what is left. Count only the ones not crossed out.
   1, 2
4. Write the answer. Accept any answer that counts the ones left.
   2 are left.

Check. Add back: 2 + 1 = 3. ✓

Watch out. Count only the ones that are not crossed out.

Method. Start at the bigger number. Count back one jump at a time.

1. Start at the number. We begin here and count back.
   5
2. Count back 3. Each jump moves one number to the left.
   2, 3, 4
3. Write the answer.
   2

Check. Count on 3 from 2: you land on 5. ✓

Watch out. Count the jumps back, not the numbers you land on.

Method. Start at the bigger number. Count back one jump at a time.

1. Start at the number. We begin here and count back.
   7
2. Count back 3. Each jump moves one number to the left.
   4, 5, 6
3. Write the answer.
   4

Check. Count on 3 from 4: you land on 7. ✓

Watch out. Count the jumps back, not the numbers you land on.

Method. Start at the bigger number. Count back one jump at a time.

1. Start at the number. We begin here and count back.
   9
2. Count back 7. Each jump moves one number to the left.
   2, 3, 4, 5, 6, 7, 8
3. Write the answer.
   2

Check. Count on 7 from 2: you land on 9. ✓

Watch out. Count the jumps back, not the numbers you land on.

Method. Take away the second number from the first. Count back to check.

1. Start with the first number. It is the number of things we begin with.
   9
2. Take away 3. Cross out or count back this many.
   9 - 3
3. Write the answer. This is how many are left.
   6

Check. Add back: 6 + 3 = 9. The answer is right.

Watch out. Count back from the first number, not up from the second.

Method. Take away the second number from the first. Count back to check.

1. Start with the first number. It is the number of things we begin with.
   3
2. Take away 1. Cross out or count back this many.
   3 - 1
3. Write the answer. This is how many are left.
   2

Check. Add back: 2 + 1 = 3. The answer is right.

Watch out. Count back from the first number, not up from the second.

Method. Start with how many there were. Take away the number that went.

1. Start with the number at the start. Amira had 5 balloons.
   5
2. Take away the ones that went. 2 flew away, so take them away.
   5 - 2 = 3
3. Write the answer.
   3

Check. Add back: 3 + 2 = 5. ✓

Watch out. Take away the number that went, not the number that stayed.

Method. Start with how many there were. Take away the number that went.

1. Start with the number at the start. Noah had 6 cakes.
   6
2. Take away the ones that went. 3 were eaten, so take them away.
   6 - 3 = 3
3. Write the answer.
   3

Check. Add back: 3 + 3 = 6. ✓

Watch out. Take away the number that went, not the number that stayed.

Method. Take away the second number from the first. Count back to check.

1. Start with the first number. It is the number of things we begin with.
   8
2. Take away 7. Cross out or count back this many.
   8 - 7
3. Write the answer. This is how many are left.
   1

Check. Add back: 1 + 7 = 8. The answer is right.

Watch out. Count back from the first number, not up from the second.

Method. Take away the second number from the first. Count back to check.

1. Start with the first number. It is the number of things we begin with.
   2
2. Take away 1. Cross out or count back this many.
   2 - 1
3. Write the answer. This is how many are left.
   1

Check. Add back: 1 + 1 = 2. The answer is right.

Watch out. Count back from the first number, not up from the second.

Method. Count the things that are not crossed out.

1. Count the whole group. There are this many to start.
   7
2. Take away the crossed-out ones. Cross out 3 and take them away.
   7 - 3 = 4
3. Count what is left. Count only the ones not crossed out.
   1, 2, 3, 4
4. Write the answer. Accept any answer that counts the ones left.
   4 are left.

Check. Add back: 4 + 3 = 7. ✓

Watch out. Count only the ones that are not crossed out.

Method. Start at the bigger number. Count back one jump at a time.

1. Start at the number. We begin here and count back.
   6
2. Count back 5. Each jump moves one number to the left.
   1, 2, 3, 4, 5
3. Write the answer.
   1

Check. Count on 5 from 1: you land on 6. ✓

Watch out. Count the jumps back, not the numbers you land on.

Method. Start at the bigger number. Count back one jump at a time.

1. Start at the number. We begin here and count back.
   6
2. Count back 1. Each jump moves one number to the left.
   5
3. Write the answer.
   5

Check. Count on 1 from 5: you land on 6. ✓

Watch out. Count the jumps back, not the numbers you land on.

Method. Take away the second number from the first. Count back to check.

1. Start with the first number. It is the number of things we begin with.
   7
2. Take away 1. Cross out or count back this many.
   7 - 1
3. Write the answer. This is how many are left.
   6

Check. Add back: 6 + 1 = 7. The answer is right.

Watch out. Count back from the first number, not up from the second.

Method. Take away the second number from the first. Count back to check.

1. Start with the first number. It is the number of things we begin with.
   9
2. Take away 5. Cross out or count back this many.
   9 - 5
3. Write the answer. This is how many are left.
   4

Check. Add back: 4 + 5 = 9. The answer is right.

Watch out. Count back from the first number, not up from the second.

Method. Take away the second number from the first. Count back to check.

1. Start with the first number. It is the number of things we begin with.
   3
2. Take away 2. Cross out or count back this many.
   3 - 2
3. Write the answer. This is how many are left.
   1

Check. Add back: 1 + 2 = 3. The answer is right.

Watch out. Count back from the first number, not up from the second.

Method. Start with how many there were. Take away the number that went.

1. Start with the number at the start. Amira had 6 balloons.
   6
2. Take away the ones that went. 5 flew away, so take them away.
   6 - 5 = 1
3. Write the answer.
   1

Check. Add back: 1 + 5 = 6. ✓

Watch out. Take away the number that went, not the number that stayed.

Method. Start with how many there were. Take away the number that went.

1. Start with the number at the start. Noah had 8 cakes.
   8
2. Take away the ones that went. 5 were eaten, so take them away.
   8 - 5 = 3
3. Write the answer.
   3

Check. Add back: 3 + 5 = 8. ✓

Watch out. Take away the number that went, not the number that stayed.