67 +28
Yukarıdaki işlemin zihinden toplama stra-
tejisi ile yapılışı aşağıdakilerden hangisi-
dir?
A) 67 +14+ 14
B) 70-3+30-2
C) 60+7 +20 + 8
D) 34+33+13 + 15
Sagot :
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