Missing Addends – Sums of 13 – Big Eyed Owl
This little fella couldn’t find any mice to eat for lunch so he decided to perch on this page and watch you fill in these 24 missing addends! Whoo! Whoo!
CCSS 1.OA.6
Subject Level: Missing Addends - Sums of 11-15
There are a slew of missing addends worksheets in this section! In each worksheet children will fill in the missing addend for one particular sum. This targets specific addition facts and strengthens skills for each sum. Start with sums of 11 and work up to sums of 15. Each sum comes in a different theme – pirates, insects, woodland animals, monsters, and zoo animals. Each sum has 12, 15, 24 or 30 problems per page for differentiated learners.
30 worksheets, 6 for each sum.
CCSS 1.OA.6
Please go to this page to see more first grade addition worksheets.
Missing Addends – Sums of 13 – Snacking Squirrel
This little squirrel won’t pay you any mind, so don’t worry about him. He’ll keep snacking while you fill in these missing addends!
CCSS 1.OA.6
Missing Addends – Sums of 14 – Googly-Eyed Monster
Monsters are known for being scary. Math can feel the same way. But this monster is not scary. Neither are these12 missing addends!
CCSS 1.OA.6
Missing Addends – Sums of 14 – One-Eyed Monster
This isn’t a missing addends worksheet! It’s got a tennis ball on it! See the round green ball? It’s about sports. Now, now … enough excuses. Time for math!
CCSS 1.OA.6
Missing Addends – Sums of 14 – Candy Corn Monster
It’s not Halloween, but this fella looks like a candy corn to me! No matter what time of year … this still looks like a missing addends worksheet! 12 problems.
CCSS 1.OA.6
Missing Addends – Sums of 14 – Furry Monster
A pink furry monster comes to you with a friendly three-toothed smile to show you how fun it can be to solve these 15 missing addends problems!
CCSS 1.OA.6
Missing Addends – Sums of 14 – Stripey Horned Monster
Missing addends and monster fun sure seem to go together! With big wide eyes, this stripey horned fella is going gaga over sums of 14!
CCSS 1.OA.6
Missing Addends – Sums of 14 – Monster Buddies
Hand in hand they come to you and as good buddies encourage each other, these monsters will support you as you finish all 30 missing addends problems.
CCSS 1.OA.6
Missing Addends – Sums of 15 – Joyous Giraffe
Can’t stop smiling when you see this cute lil’ darlin’ looking at you! And you won’t be able to stop smilin’ when you breeze through these missing addends! On pink tippie-toes, this elephant looks a bit stressed … but you can take a big breath and relax. This missing addends page is low key with only 12 problems. While you’re filling in the missing addends go ahead and reach your hand out to pet this likable lion. He’s cute and sweet! 12 problems, both addends missing. I know you’re going to be busy filling in the 15 missing addends on this page, but this tame fella wants to rub up against you. Can you hear this big cat purr?
CCSS 1.OA.6 
Missing Addends – Sums of 15 – Pink-Toed Elephant
CCSS 1.OA.6
Missing Addends – Sums of 15 – Likable Lion
CCSS 1.OA.6
Missing Addends – Sums of 15 – Tame Tiger
CCSS 1.OA.6
Missing Addends – Sums of 15 – Double Trouble
Yes, you’re seeing double! There are 24 missing addends problems instead of 12 like the three pages above. Double the practice, double the fun!
CCSS 1.OA.6
Missing Addends – Sums of 15 – Stripes and Smiles
With sums of 15, these 30 missing addends problems will make you smarter than smart! This zebra is in the right place with his 15 stripes!
CCSS 1.OA.6
