The Equal Sign
Dot and Sam have blocks. Are the two sets the same?
1st Grade MathStep 1: Add Dot's Blocks
Dot has 3 blocks and 2 blocks. Add them up!
3 + 2 = 5. The sum is 5. Dot has 5 blocks.
Step 2: Is It the Same?
Dot has 5. Sam has 5. Are the two sets the same?
5 = 5. The two sides are
equal!
The = tells us the sides are the same.
= Means the Same
5 = 5
Equal!
= tells us: the two sides are the same.
Step 1: Check one side.
Step 2: Check the other side.
Step 3: The same? Then they are equal!
Step 1: Check one side.
Step 2: Check the other side.
Step 3: The same? Then they are equal!
Check It!
7 = 8 - 1
Are the two sides the same?
8 - 1 = 7. So it is 7 = 7. The two sides are the same!
Flip It!
5 + 2 = 2 + 5
Check the two sides. Are they the same?
5 + 2 = 7 and 2 + 5 = 7. So it is 7 = 7. It is the same!
What Fits?
6 = ?
What makes the two sides the same?
6 = 6. The two sides are
equal!
Kit and Meg
Kit has 2 and 3. Meg has 4 and 1. Are the sets equal?
2 + 3 = 5 and 4 + 1 = 5. So 5 = 5. The sets are equal!
Same or Not?
4 + 1 = 5 + 2
Check the two sides. Is this the same?
4 + 1 = 5, but 5 + 2 = 7. 5 is not 7. It is not the same!
Make It Equal!
3 + 5 = 4 + ?
Make the two sides the same!
3 + 5 = 8. And 4 + 4 = 8. So 8 = 8. Equal!
When do you check if two sets are the same?
Great Work!
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