Use Rectangles and Circles to Show Halves and Fourths: CCSS.MATH.CONTENT.1.G.A.3 - Common Core: 1st Grade Math
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If I cut this rectangle in half, how many pieces will I have?
If I cut this rectangle in half, how many pieces will I have?
When we cut something in half, we get 
equal pieces.
When we cut something in half, we get
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If I cut this circle in half, how many pieces will I have?
If I cut this circle in half, how many pieces will I have?
When we cut something in half, we get two equal pieces.
When we cut something in half, we get two equal pieces.
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If I cut this rectangle into fourths, or quarters, how many pieces will I have?
If I cut this rectangle into fourths, or quarters, how many pieces will I have?
When we cut something into fourths, or quarters, we get four equal pieces.
When we cut something into fourths, or quarters, we get four equal pieces.
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If I cut this circle into fourths, or quarters, how many pieces will I have?
If I cut this circle into fourths, or quarters, how many pieces will I have?
When we cut something into fourths, or quarters, we get four equal pieces.
When we cut something into fourths, or quarters, we get four equal pieces.
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If I cut a rectangle in half, how am I changing the size?
If I cut a rectangle in half, how am I changing the size?
When we cut something in half, we get two smaller pieces that equal each other. If we put those pieces back together, we’d get the original size of the rectangle.
When we cut something in half, we get two smaller pieces that equal each other. If we put those pieces back together, we’d get the original size of the rectangle.
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If I cut a rectangle into fourths, how am I changing the size?
If I cut a rectangle into fourths, how am I changing the size?
When we cut something in fourths, we get four smaller pieces that equal each other. If we put those pieces back together, we’d get the original size of the rectangle.
When we cut something in fourths, we get four smaller pieces that equal each other. If we put those pieces back together, we’d get the original size of the rectangle.
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If we have two rectangles of the same size, and we cut one of them in half, and one of them in fourths, which pieces will be smaller?
If we have two rectangles of the same size, and we cut one of them in half, and one of them in fourths, which pieces will be smaller?
Cutting an object into four pieces makes the pieces smaller because a fourth is smaller than a half.
Cutting an object into four pieces makes the pieces smaller because a fourth is smaller than a half.
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If I cut a rectangle into two parts, I am cutting it in ___________.
If I cut a rectangle into two parts, I am cutting it in ___________.
When we cut something into two parts, which means the same thing as cutting it in half.
When we cut something into two parts, which means the same thing as cutting it in half.
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If I cut a rectangle into four parts, I am cutting it in __________.
If I cut a rectangle into four parts, I am cutting it in __________.
When we cut something into four parts, which means the same thing as cutting it in to fourths.
When we cut something into four parts, which means the same thing as cutting it in to fourths.
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What portion of the circle is striped?
What portion of the circle is striped?
The circle is divided into two equal sizes. One side is striped and one side is blue. So half of the circle is striped.
The circle is divided into two equal sizes. One side is striped and one side is blue. So half of the circle is striped.
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What portion of the circle is striped?
What portion of the circle is striped?
The circle is divided into four equal sizes. One piece is striped and the other tree pieces are blue. So a fourth of the circle is striped.
The circle is divided into four equal sizes. One piece is striped and the other tree pieces are blue. So a fourth of the circle is striped.
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A fourth means the same thing as a ____________.
A fourth means the same thing as a ____________.
A fourth and a quarter mean the same thing because both words mean 
pieces.
A fourth and a quarter mean the same thing because both words mean
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What portion of the rectangle is green?
What portion of the rectangle is green?
The rectangle is split into two pieces and one of those pieces is colored green. This means that half of the rectangle is green.
The rectangle is split into two pieces and one of those pieces is colored green. This means that half of the rectangle is green.
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Fill in the blank.
__________ the rectangle is green.
Fill in the blank.
__________ the rectangle is green.
The rectangle is cut into two pieces and one of those pieces is green. This means the half of the rectangle is green.
The rectangle is cut into two pieces and one of those pieces is green. This means the half of the rectangle is green.
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If I cut a rectangle is half, how many pieces will I have?
If I cut a rectangle is half, how many pieces will I have?
Cutting a rectangle in half means that we will have two pieces.
Cutting a rectangle in half means that we will have two pieces.
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If I cut a rectangle into fourths, how many pieces will I have?
If I cut a rectangle into fourths, how many pieces will I have?
Cutting a rectangle into fourths means we will have 
pieces.
Cutting a rectangle into fourths means we will have
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What portion of the rectangle is green?
What portion of the rectangle is green?
The rectangle is split into four pieces and one of those pieces is colored green. This means that a fourth of the rectangle is green.
The rectangle is split into four pieces and one of those pieces is colored green. This means that a fourth of the rectangle is green.
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Fill in the blank.
A __________ the rectangle is green.
Fill in the blank.
A __________ the rectangle is green.
The rectangle is cut into two pieces and one of those pieces is green. This means the half of the rectangle is green.
The rectangle is cut into two pieces and one of those pieces is green. This means the half of the rectangle is green.
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A fourth means the same thing as a __________.
A fourth means the same thing as a __________.
A fourth and a quarter both mean the same thing. They both mean that something is split into four equal parts.
A fourth and a quarter both mean the same thing. They both mean that something is split into four equal parts.
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If I cut a circle into fourths, how am I changing the size?
If I cut a circle into fourths, how am I changing the size?
When we cut something in fourths, we get four smaller pieces that equal each other. If we put those pieces back together, we’d get the original size of the circle.
When we cut something in fourths, we get four smaller pieces that equal each other. If we put those pieces back together, we’d get the original size of the circle.
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