柏樹的棵數(shù) 6:5 50
分析:(1)把柏樹的棵數(shù)看作單位“1”,則松樹棵數(shù)是柏樹棵數(shù)的(1+
),進而根據(jù)題意,進行比即可;
(2)把柏樹的棵數(shù)看作單位“1”,即柏樹棵數(shù)的(1+
)是松樹棵數(shù),是60棵,根據(jù)“對應(yīng)數(shù)÷對應(yīng)分率=單位“1”的量”進行解答即可.
解答:(1)把柏樹的棵數(shù)看作單位“1”,
(1+
):1,
=
:1
=6:5;
(2)60÷(1+
),
=60÷
,
=60×
,
=50(棵);
答:題中柏樹的棵數(shù)是單位“1”.松樹和柏樹的棵數(shù)比是6:5,如果松樹60棵,則柏樹有50棵;
故答案為:柏樹的棵數(shù),6:5,50.
點評:解答此題的關(guān)鍵:判斷出單位“1”,都轉(zhuǎn)化為同一單位“1”下進行比,進而根據(jù)“對應(yīng)數(shù)÷對應(yīng)分率=單位“1”的量”進行解答.