Question

單項(xiàng)式7ab²c³的次數(shù)是

1. A.
   3
2. B.
   5
3. C.
   6
4. D.
   7

Answer 1

C
分析：根據(jù)單項(xiàng)式次數(shù)的定義來求解．單項(xiàng)式中所有字母的指數(shù)和叫做這個(gè)單項(xiàng)式的次數(shù)．
解答：根據(jù)單項(xiàng)式定義得：?jiǎn)雾?xiàng)式7ab²c³的次數(shù)是1+2+3=6．
故選C．
點(diǎn)評(píng)：本題考查了單項(xiàng)式次數(shù)的定義．確定單項(xiàng)式的次數(shù)時(shí)，把一個(gè)單項(xiàng)式分解成數(shù)字因數(shù)和字母因式的積的形式，是找準(zhǔn)單項(xiàng)式的系數(shù)和次數(shù)的關(guān)鍵．