Rutgers/Lucent ALLIES IN TEACHING MATHEMATICS AND TECHNOLOGY Grant
Using technology not simply to do things better, but to do better things.


OTHER STUDENT RESPONSES:
Divided Rectangle


Answer #1: Yes. I found 2 and 47, and 3 and 24.

Explanation: I used a guess and check method. I discerned that the product would probably have to be a two-digit number because the sum would in most cases not exceed 100.(when dealing with at least number that has only one digit) I just used a couple numbers where the unit digit of the product of the second digit of the two digit number and the one digit number was equal to the first digit of the two digit number.


Answer #2: I think the answer is 20.

Explanation: I knew that x was bigger than 15 so the answer had to be more than 15. It also was smaller than 25. I thought it looked like it was exactly in the middle of 15 and 25.


Answer#3: X is -5.

Explanation: If you add the right side, it equals 40, the left side that is given is 45, so you have to subtract and you get -5.


Answer #4: The area of rectangle x is 35 square units.

Explanation: First, I noticed that the dark yellow rectangle's area was ten square units less than the yellow rectangle's area. Then I noticed that the yellow rectangle's area is twenty square units less than the pale yellow rectangle.
I then realized that the lower rectangles' area is ten square units less than the upper rectangles' area, and the left rectangles' area is twenty square units greater than the right rectangles' area. Finally, I subtracted 10 from the area of the pale rectangle's area, and got 35 units squared for x.


Answer #5: X equal 55

Explanation: 45 +25 = 15 + x
45 + 25 - 15 = x
55 = x


Answer#6: X = 18

Explanation: the area of a rectangle is length times width I figured out what numbers multiplied together made the areas of the rectangles I figured out what the length and width of X was and I multiplied it together making 18

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