Add It Up!
Kit gets shells at the sea. Can we add them all up?
1st Grade MathStep 1: Add the Ones
Kit has 23 shells. Then she gets 5 shells. We use the blocks to model the ones in each shell total. First, we add the ones.
3 + 5 = ?
3 ones and 5 ones make 8 ones. Next we add the tens.
Step 2: Add the Tens
Kit has 2 tens and 8 ones. We use the blocks to model Kit's shells. What is the sum?
2 tens and 8 ones make 28. Kit has 28 shells!
Big Math Tip
How to Add Big Numbers
Step 1: Add ones to ones.
Step 2: Add tens to tens.
Big tip: 10 ones make 1 new ten!
Step 2: Add tens to tens.
Big tip: 10 ones make 1 new ten!
Kit
Ones go with ones. Tens go with tens!
Add It Up!
Add tens to tens!
40 + 30 = ?
4 tens and 3 tens make 7 tens. The sum is 70.
Count On!
Go to 62. Then count on 7 steps.
62 + 7 = ?
Count on: 63, 64, 65, 66, 67, 68, 69. The sum is 69.
Help Sam Add!
Sam has 35 rocks. Then he gets 20 rocks.
How many rocks in all?
35 + 20 = 55. Tens: 3 + 2 = 5 tens. Ones stay at 5.
Fill in the Blank!
24 + ? = 29
24 + 5 = 29. Ones: 4 + 5 = 9. Tens stay at 2.
Make a Ten!
The ones can make a new ten!
38 + 6 = ?
Ones: 8 + 6 = 14. That is 1 new ten and 4 ones.
Tens: 3 + 1 = 4. The sum is 44.
The Big One!
Meg has 65 cups. Then she gets 9 cups.
How many cups in all?
Ones: 5 + 9 = 14. Make a new ten!
Tens: 6 + 1 = 7. The sum is 74.
When do you add at home? Tell a grown-up!
Great Work!
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