Mathematics
Junior High
Resolved
想請問這題，沒什麼想法
( )12已知A=20×53,且可以用科學記號表為 a×10,則n 之值為何?
(A) 10
(C) 12
11
(B) 11 in Eat
下
(D) 13
10
ax 10" = 1° x 513.
2100
二數的大
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換個方式講，可以嘗試把5^13拆成5^10*5^3～應該比較好理解