萍萍、丽丽和颖颖比赛踢毽子,萍萍连续踢了4分钟,平均每分踢62个,丽丽连续踢了3...
解:(1)4×62 3×68,
=248 204,
=452(个);
答:萍萍与丽丽一共踢了452个.
(2)5×57-3×68,
=285-204,
=81(个);
答:颖颖比丽丽一共多踢了81个.
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解:(1)4×62 3×68,
=248 204,
=452(个);
答:萍萍与丽丽一共踢了452个.
(2)5×57-3×68,
=285-204,
=81(个);
答:颖颖比丽丽一共多踢了81个.