### Missing Addend – Sums of 18 – Just Keep Swimming

Just keep swimming along and following your school … find each missing addend in these 24 problems with sums of 18 – a great way to practice addition facts!
CCSS 1.OA.6

### Missing Addend – Sums of 18 – Yellow Submarine

We all live in a yellow submarine, … well at least this little fella does … and he’s watching you find each missing addend! 30 problems.
CCSS 1.OA.6

### Missing Addend – Sums of 19 – Balancing Elephant

Filling in each missing addend sure is a balancing act! Make sure each of these 12 sets of addends adds up to the sum of 19.
CCSS 1.OA.6

### Missing Addend – Sums of 19 – Fun-Loving Seal

Bark! Bark! Barking and bouncing a ball … that’s what seals do. And they have fun while they’re doing it, just like I’m sure you’ll have while filling in each missing addend!
CCSS 1.OA.6

### Missing Addend – Sums of 19 – On the Ball Hippo

C’mon, get with it! Get “on the ball” and fill in these missing addends with sums of 19. The first or second addend is missing in these 12 problems.
CCSS 1.OA.6

### Missing Addend – Sums of 19 – Star of the Show

A lion sits on his star studded drum, but YOU are really the star of the show. Show us what you’ve got! Fill in each of these 15 missing addend problems.
CCSS 1.OA.6

### Missing Addend – Sums of 19 – Monkey Mania!

Quit monkeying around! Get serious and get some serious smarts! Each missing addend problem in these 24 problems is sure to make you that much smarter.
CCSS 1.OA.6

### Missing Addend – Sums of 19 – Under the Big Top

This missing addend worksheet with 30 problems and sums of 19 is only for the serious and undistracted. Why? There’s a lot going on under the big top!
CCSS 1.OA.6

### Missing Addend – Sums of 20 – Berry Pie

Just as this mouse wouldn’t dare leave one single berry behind, so too, you wouldn’t dare leave one single missing addend problem undone … would you?
CCSS 1.OA.6

### Missing Addend – Sums of 20 – My Berry!

This cute little guy is pretty selfish about his berry, just like I know you’ll be about the 12 missing addend problems on this worksheet!
CCSS 1.OA.6

### Missing Addend – Sums of 20 – Berry Preserves

Do you look forward to the sweetness of Grandma’s homemade berry preserves? Well, I preserved each missing addend just for you! 12 sweet problems!
CCSS 1.OA.6

### Missing Addend – Sums of 20 – Double Berries! Yum!

Just like I want to share this missing addend worksheet with you, this little mouse wants to share her berries, too! 15 yummy problems.
CCSS 1.OA.6

### Missing Addend – Sums of 20 – Berry Box

Wouldn’t you like to jump into this missing addend worksheet like this mouse has jumped into this basket of berries? Bring it on! 24 problems.
CCSS 1.OA.6

### Missing Addend – Sums of 20 – Fresh Berries

Need a challenge? Try filling in these 30 missing addend problems with all the correct answers before the mice can eat the berries. Ready, set … GO!
CCSS 1.OA.6