当时钟是1点45分时,分针和时针所成的钝角是______度

当时钟是1点45分时,分针和时针所成的钝角是______度.
2025-04-06 05:28:14
推荐回答(1个)
回答1:

(360°÷60)×[20+(5÷60)×45],
=6°×[20+
1
12
×45
],
=6°×[20+3.75],
=6°×23.75,
=142.5°
答:分针和时针所成的钝角是142.5度.
故答案为:142.5.