Lesson 14-15 Adding with 9, 8, or 7 – Make a Ten (Worksheet)

Adding with 9 (Easiest)

• When adding with 9, you only need one more to make a ten. Cross out the last counter in the bottom frame, and move it to the top frame. Now you can see the answer without counting.
• When adding with 9, you only need one more to make a ten. So, look at the other addend and think one less. In the first example, one less than 8 is 7, which is a clue that the sum is 17

Adding with 8 (Second Easiest)

• When adding with 8, you only need two more to make a ten. Cross out the last two counters from the bottom frame, and move them to the top frame.
• When adding with 8, you only need two more to make a ten. So, look at the other addend and think two less. In the first example, two less than 6 is 4, which is a clue that the sum is 14

Adding with 7 (Third Easiest)

• When you add with 7, you only need three more to make a ten. Cross out the last three counters from the bottom frame, and move them to the top frame.
• When you add with 7, you only need three more to make a ten. So, look at the other addend and think three less. In the first example, three less than 5 is 2, which is a clue that the sum is 12.

Review: Lesson 13 and Lesson 14 showed you how to Make a Ten when adding with 9, 8, or 7. When you Make a Ten, you can see the answer more easily in your mind, and you avoid counting one by one on your fingers. This will help you memorize your facts faster because your brain trusts what in can see (seeing is believing). These are the 15 facts that you need to memorize when adding with 9, 8, or 7. The other facts have already been memorized with the Tens, Doubles, and Adding with 1, 2, or 3. Adding with 9 has the most facts, but they are also the easiest.

• Adding with 7: Easy. Clue: Look at the other addend and think three less.
• Adding with 8: Very Easy. Clue: Look at the other addend and think two less.
• Adding with 9: Super Easy. Clue: Look at the other addend and think one less.

Directions: Add. Look for the largest addend first since adding with 9 is the easiest, adding with 8 is the second easiest, and adding with 7 is the third easiest.