Multiple Choice
Which of the following uses the doubling method of informal counting to solve the following:
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
Correct Answer:
Verified
Correct Answer:
Verified
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