Reception Maths: Putting two groups together

Key words. Add means put together. The sum is the total.

Method. Put the two groups together. Then count all the things, one at a time.

1. Count the first group: 2. Touch each one once.
   2
2. Count the second group: 3. Put the groups together and count on.
   2 + 3
3. Count all of them. Count from 1 to the total, touching each thing once.
   1, 2, 3, 4, 5
4. Write the answer.
   5

Check. Count the whole group from the other end. You get 5 again. ✓

Watch out. Do not count the first group again from 1 when you count all.

Key words. Add means put together. The sum is the total.

Method. Put the two groups together. Then count all the things, one at a time.

1. Count the first group: 4. Touch each one once.
   4
2. Count the second group: 2. Put the groups together and count on.
   4 + 2
3. Count all of them. Count from 1 to the total, touching each thing once.
   1, 2, 3, 4, 5, 6
4. Write the answer.
   6

Check. Count the whole group from the other end. You get 6 again. ✓

Watch out. Do not count the first group again from 1 when you count all.

Key words. Add means put together. The sum is the total.

Method. Put the two groups together. Then count all the things, one at a time.

1. Count the first group: 5. Touch each one once.
   5
2. Count the second group: 4. Put the groups together and count on.
   5 + 4
3. Count all of them. Count from 1 to the total, touching each thing once.
   1, 2, 3, 4, 5, 6, 7, 8, 9
4. Write the answer.
   9

Check. Count the whole group from the other end. You get 9 again. ✓

Watch out. Do not count the first group again from 1 when you count all.

Key words. Add means put together. The sum is the total.

Method. Put the two groups together. Then count all the things, one at a time.

1. Count the first group: 3. Touch each one once.
   3
2. Count the second group: 6. Put the groups together and count on.
   3 + 6
3. Count all of them. Count from 1 to the total, touching each thing once.
   1, 2, 3, 4, 5, 6, 7, 8, 9
4. Write the answer.
   9

Check. Count the whole group from the other end. You get 9 again. ✓

Watch out. Do not count the first group again from 1 when you count all.

Key words. Add means put together. The sum is the total.

Method. Put the two groups together. Then count all the things, one at a time.

1. Count the first group: 1. Touch each one once.
   1
2. Count the second group: 7. Put the groups together and count on.
   1 + 7
3. Count all of them. Count from 1 to the total, touching each thing once.
   1, 2, 3, 4, 5, 6, 7, 8
4. Write the answer.
   8

Check. Count the whole group from the other end. You get 8 again. ✓

Watch out. Do not count the first group again from 1 when you count all.

Key words. Add means put together. The sum is the total.

Method. Put the two groups together. Then count all the things, one at a time.

1. Count the first group: 6. Touch each one once.
   6
2. Count the second group: 4. Put the groups together and count on.
   6 + 4
3. Count all of them. Count from 1 to the total, touching each thing once.
   1, 2, 3, 4, 5, 6, 7, 8, 9, 10
4. Write the answer.
   10

Check. Count the whole group from the other end. You get 10 again. ✓

Watch out. Do not count the first group again from 1 when you count all.

Key words. Add means put together. The sum is the total.

Method. Put the two groups together. Then count all the things, one at a time.

1. Count the first group: 2. Touch each one once.
   2
2. Count the second group: 6. Put the groups together and count on.
   2 + 6
3. Count all of them. Count from 1 to the total, touching each thing once.
   1, 2, 3, 4, 5, 6, 7, 8
4. Write the answer.
   8

Check. Count the whole group from the other end. You get 8 again. ✓

Watch out. Do not count the first group again from 1 when you count all.

Key words. Add means put together. The sum is the total.

Method. Put the two groups together. Then count all the things, one at a time.

1. Count the first group: 3. Touch each one once.
   3
2. Count the second group: 1. Put the groups together and count on.
   3 + 1
3. Count all of them. Count from 1 to the total, touching each thing once.
   1, 2, 3, 4
4. Write the answer.
   4

Check. Count the whole group from the other end. You get 4 again. ✓

Watch out. Do not count the first group again from 1 when you count all.

Key words. Add means put together. The sum is the total.

Method. Put the two groups together. Then count all the things, one at a time.

1. Count the first group: 4. Touch each one once.
   4
2. Count the second group: 5. Put the groups together and count on.
   4 + 5
3. Count all of them. Count from 1 to the total, touching each thing once.
   1, 2, 3, 4, 5, 6, 7, 8, 9
4. Write the answer.
   9

Check. Count the whole group from the other end. You get 9 again. ✓

Watch out. Do not count the first group again from 1 when you count all.

Key words. Add means put together. The sum is the total.

Method. Put the two groups together. Then count all the things, one at a time.

1. Count the first group: 3. Touch each one once.
   3
2. Count the second group: 4. Put the groups together and count on.
   3 + 4
3. Count all of them. Count from 1 to the total, touching each thing once.
   1, 2, 3, 4, 5, 6, 7
4. Write the answer.
   7

Check. Count the whole group from the other end. You get 7 again. ✓

Watch out. Do not count the first group again from 1 when you count all.

Key words. Add means put together. The sum is the total.

Method. Put the two groups together. Then count all the things, one at a time.

1. Count the first group: 2. Touch each one once.
   2
2. Count the second group: 6. Put the groups together and count on.
   2 + 6
3. Count all of them. Count from 1 to the total, touching each thing once.
   1, 2, 3, 4, 5, 6, 7, 8
4. Write the answer.
   8

Check. Count the whole group from the other end. You get 8 again. ✓

Watch out. Do not count the first group again from 1 when you count all.

Method. Put the groups together in each order, then count all.

1. Count 3 and 2. Count all the things.
   1, 2, 3, 4, 5
2. Count 2 and 3. Count all the things again, in the other order.
   1, 2, 3, 4, 5
3. Compare the totals. The totals are the same.
   5 = 5
4. Write the answer.
   Yes. Both make 5.

Check. The two groups are the same, only in a different order. ✓

Watch out. Changing the order does not change the total.