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

Method. Take the part you know away from the whole.

1. Read the bond. The whole is 10 and one part is 9.
   10 and 9
2. Take the part away. What is left is the other part.
   10 - 9 = 1
3. Write the answer.
   1

Check. Add back: 1 + 9 = 10. ✓

Watch out. The bond gives you the subtraction fact too.

Method. Put the two groups together. Start at the bigger number and count on.

1. Start at the bigger number. It is quicker to count on from the bigger one.
   7
2. Count on 1 more. We add 1 to 7.
   7 + 1
3. Write the answer.
   8

Check. Count on from the other number too. You get 8 both ways.

Watch out. Count on, do not start again from one.

Method. Take the part you know away from the whole.

1. Read the bond. The whole is 3 and one part is 1.
   3 and 1
2. Take the part away. What is left is the other part.
   3 - 1 = 2
3. Write the answer.
   2

Check. Add back: 2 + 1 = 3. ✓

Watch out. The bond gives you the subtraction fact too.

Method. Put the two groups together. Start at the bigger number and count on.

1. Start at the bigger number. It is quicker to count on from the bigger one.
   5
2. Count on 3 more. We add 3 to 5.
   5 + 3
3. Write the answer.
   8

Check. Count on from the other number too. You get 8 both ways.

Watch out. Count on, do not start again from one.

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.
   6
2. Take away 2. Cross out or count back this many.
   6 - 2
3. Write the answer. This is how many are left.
   4

Check. Add back: 4 + 2 = 6. 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.
   4
2. Take away 3. Cross out or count back this many.
   4 - 3
3. Write the answer. This is how many are left.
   1

Check. Add back: 1 + 3 = 4. The answer is right.

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

Method. Find the missing part. Ask what goes with the known part to make the whole.

1. Look at the whole and the part you know. The whole is 8 and the known part is 6.
   8 and 6
2. Count on from the known part to the whole. Or take the known part away from the whole.
   8 - 6 = 2
3. Write the missing part.
   2

Check. Put the two parts back together: 6 and 2 make 8.

Watch out. The two parts always add up to the whole.

Method. Find the missing part. Ask what goes with the known part to make the whole.

1. Look at the whole and the part you know. The whole is 8 and the known part is 5.
   8 and 5
2. Count on from the known part to the whole. Or take the known part away from the whole.
   8 - 5 = 3
3. Write the missing part.
   3

Check. Put the two parts back together: 5 and 3 make 8.

Watch out. The two parts always add up to the whole.

Method. Adding means we get more. Start with what there was and add the new ones.

1. Start with the number at the start. Amira had 2 pencils.
   2
2. Add the new ones. 3 more came, so we add them.
   2 + 3 = 5
3. Write the answer.
   5

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

Watch out. More means add. Less means take away.

Method. Taking away means we get fewer. Start with the number at the start, then take away.

1. Start with the number at the start. Noah had 9 stickers.
   9
2. Take away the ones that went. 8 went, so we take them away.
   9 - 8 = 1
3. Write the answer.
   1

Check. Add back: 1 + 8 = 9. ✓

Watch out. Less means take away. Check your answer makes sense.

Method. Take the part you know away from the whole.

1. Read the bond. The whole is 6 and one part is 1.
   6 and 1
2. Take the part away. What is left is the other part.
   6 - 1 = 5
3. Write the answer.
   5

Check. Add back: 5 + 1 = 6. ✓

Watch out. The bond gives you the subtraction fact too.

Method. Put the two groups together. Start at the bigger number and count on.

1. Start at the bigger number. It is quicker to count on from the bigger one.
   8
2. Count on 1 more. We add 1 to 8.
   8 + 1
3. Write the answer.
   9

Check. Count on from the other number too. You get 9 both ways.

Watch out. Count on, do not start again from one.

Method. Take the part you know away from the whole.

1. Read the bond. The whole is 9 and one part is 8.
   9 and 8
2. Take the part away. What is left is the other part.
   9 - 8 = 1
3. Write the answer.
   1

Check. Add back: 1 + 8 = 9. ✓

Watch out. The bond gives you the subtraction fact too.

Method. Put the two groups together. Start at the bigger number and count on.

1. Start at the bigger number. It is quicker to count on from the bigger one.
   7
2. Count on 1 more. We add 1 to 7.
   7 + 1
3. Write the answer.
   8

Check. Count on from the other number too. You get 8 both ways.

Watch out. Count on, do not start again from one.

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.
   5
2. Take away 3. Cross out or count back this many.
   5 - 3
3. Write the answer. This is how many are left.
   2

Check. Add back: 2 + 3 = 5. 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.
   10
2. Take away 8. Cross out or count back this many.
   10 - 8
3. Write the answer. This is how many are left.
   2

Check. Add back: 2 + 8 = 10. The answer is right.

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

Method. Find the missing part. Ask what goes with the known part to make the whole.

1. Look at the whole and the part you know. The whole is 7 and the known part is 4.
   7 and 4
2. Count on from the known part to the whole. Or take the known part away from the whole.
   7 - 4 = 3
3. Write the missing part.
   3

Check. Put the two parts back together: 4 and 3 make 7.

Watch out. The two parts always add up to the whole.

Method. Find the missing part. Ask what goes with the known part to make the whole.

1. Look at the whole and the part you know. The whole is 5 and the known part is 3.
   5 and 3
2. Count on from the known part to the whole. Or take the known part away from the whole.
   5 - 3 = 2
3. Write the missing part.
   2

Check. Put the two parts back together: 3 and 2 make 5.

Watch out. The two parts always add up to the whole.

Method. Adding means we get more. Start with what there was and add the new ones.

1. Start with the number at the start. Amira had 2 pencils.
   2
2. Add the new ones. 6 more came, so we add them.
   2 + 6 = 8
3. Write the answer.
   8

Check. Count on 6 from 2: you reach 8. ✓

Watch out. More means add. Less means take away.

Method. Taking away means we get fewer. Start with the number at the start, then take away.

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

Check. Add back: 1 + 2 = 3. ✓

Watch out. Less means take away. Check your answer makes sense.