Which of the following uses the doubling method of informal counting to solve the equation "3 + 4 =" ?
A)(1+1+1) + (1+1+1+1) = 7
B)(3+4) + (3+4) - (3+4) = 7
C)3+4 = (3+3) +1 = 6+1 = 7
D)2+2+2+1 = 7

Question

Quizplus · Accepted Answer

The doubling method would be 3 + 4 = (3 + 3) +1 = 6 + 1 = 7. Using the doubling method of informal counting involves taking apart a number so that it is the same number as the one being added to it and then adding the difference. It is a way to do mental math easily in one's head.

Which of the Following Uses the Doubling Method of Informal