Riley says this picture represents 0.26 because the blue squares represent tenths and the red rectangles represent hundredths. 10 blue squares make 1 red rectangle, and 10 times 10 equals 100.

Use the drop-down menus to explain why Riley's reasoning is incorrect.

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)