3rd Grade Math - Use Tiling to Show Area of Rectangles: CCSS.Math.Content.3.MD.C.7c

If the formula to find the area of the white side of the rectangle below is $1\times7$ , what is the formula to find that area of the purple side?

Screen shot 2015 11 04 at 2.23.08 pm

$3\times7$

$2\times7$

$7\times2$

$3\times6$

$6\times4$

Explanation

Both the purple side and the white side have the same width, $7\ units$ . The length of the purple side is $3\ units$ . Thus the area formula for the purple side of the rectangle is $3\times7$ .

If the formula to find the area of the white side of the rectangle below is $7\times6$ , what is the formula to find that area of the purple side?

Screen shot 2015 11 04 at 3.36.47 pm

$7\times3$

$7\times4$

$7\times2$

$6\times4$

$6\times2$

Explanation

Both the purple side and the white side have the same length, $7\ units$ . The width of the purple side is $3\ units$ . Thus the area formula for the purple side of the rectangle is $7\times3$ .

If the formula to find the area of the white side of the rectangle below is $7\times1$ , what is the formula to find that area of the purple side?

Screen shot 2015 11 04 at 3.48.44 pm

$7\times8$

$7\times9$

$9\times6$

$9\times7$

$9\times8$

Explanation

Both the purple side and the white side have the same length, $7\ units$ . The width of the purple side is $8\ units$ . Thus the area formula for the purple side of the rectangle is $7\times8$ .

If the formula to find the area of the white section of the rectangle below is $9\times3$ , what is the formula to find that area of the purple section?

Screen shot 2015 11 04 at 3.54.29 pm

$9\times6$

$9\times8$

$9\times7$

$7\times8$

Explanation

Both the purple section and the white section have the same length, $9\ units$ . The width of the purple section is $6\ units$ . Thus the area formula for the purple section of the rectangle is $9\times6$ .

If the formula to find the area of the white side of the rectangle below is $3\times5$ , what is the formula to find that area of the purple side?

Screen shot 2015 11 04 at 2.50.56 pm

$2\times5$

$1\times5$

$2\times6$

$3\times6$

$5\times3$

Explanation

Both the purple side and the white side have the same width, $5\ units$ . The length of the purple side is $2\ units$ . Thus the area formula for the purple side of the rectangle is $2\times5$ .

If the formula to find the area of the white side of the rectangle below is $2\times3$ , what is the formula to find that area of the purple side?

Screen shot 2015 11 04 at 1.30.24 pm

$3\times3$

$3\times2$

$2\times3$

$5\times3$

$5\times2$

Explanation

Both the purple side and the white side have the same width, $3\ units$ . The length of the purple side is $3\ units$ . Thus the area formula for the purple side of the rectangle is $3\times3$ .

If the formula to find the area of the white side of the rectangle below is $7\times3$ , what is the formula to find that area of the purple side?

Screen shot 2015 11 04 at 3.44.18 pm

$7\times6$

$7\times5$

$7\times7$

$6\times5$

$6\times6$

Explanation

Both the purple side and the white side have the same length, $7\ units$ . The width of the purple side is $6\ units$ . Thus the area formula for the purple side of the rectangle is $7\times6$ .

If the formula to find the area of the white side of the rectangle below is $4\times8$ , what is the formula to find that area of the purple side?

Screen shot 2015 11 04 at 2.31.39 pm

$1\times8$

$1\imes7$

$7\times2$

$8\times4$

$3\times8$

Explanation

Both the purple side and the white side have the same width, $8\ units$ . The length of the purple side is $1\ units$ . Thus the area formula for the purple side of the rectangle is $1\times8$ .

If the formula to find the area of the white side of the rectangle below is $9\times4$ , what is the formula to find that area of the purple side?

Screen shot 2015 11 04 at 3.56.07 pm

$9\times5$

$9\times6$

$9\times7$

$8\times7$

$8\times6$

Explanation

Both the purple side and the white side have the same length, $9\ units$ . The width of the purple side is $5\ units$ . Thus the area formula for the purple side of the rectangle is $9\times5$ .

If the formula to find the area of the white side of the rectangle below is $7\times2$ , what is the formula to find that area of the purple side?

Screen shot 2015 11 04 at 3.46.06 pm

$7\times7$

$7\times6$

$5\times7$

$5\times6$

$6\times5$

Explanation

Both the purple side and the white side have the same length, $7\ units$ . The width of the purple side is $7\ units$ . Thus the area formula for the purple side of the rectangle is $7\times7$ .

Use Tiling to Show Area of Rectangles: CCSS.Math.Content.3.MD.C.7c

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