问题
填空题
9时整,钟面上的时针和分针成______度的角;4时整,钟面上的时针和分针成______度的角.
答案
360÷60×15,
=6×15,
=90(度).
360÷60×20,
=6×20,
=120(度).
故答案为:90;120.
9时整,钟面上的时针和分针成______度的角;4时整,钟面上的时针和分针成______度的角.
360÷60×15,
=6×15,
=90(度).
360÷60×20,
=6×20,
=120(度).
故答案为:90;120.