www.2616.net > 15.8 45.8

15.8 45.8

加括号,变成: 15×(8+4)÷4=45

钟表12个数字,每相邻两个数字之间的夹角为30°,∵从8时15分到8时45分有30分钟时间,∴分针旋转了30°×6=180°,又∵时针与分针转动的度数关系:分针每转动1°时针转动( 112)°,∴时针旋转的角度为180°×112=15°.故从8时15分到8时45分,分针转了180°...

12÷15=45=8:10=80%=0.8.故答案为:12,10,80,0.8.

解: 45÷5/8*8*15 =45*8/5*8/15 =72*8/15 =38.4

25-24等于1

45x15分之4x8 =12x8 =96 用了乘法交换律

上午8:45到上午10:15分有(1.5)个小时; 10:15-8:45 =1:30 前提在是同一天。

1. fifteen past six=six fifteen 2. 8 o'clock 3.twenty past nine=nine twenty 4.a quarter to eight=seven forty-five 5.twenty to nine=eight forty 6.twenty-five past seven=seven twenty-five 7.five to eleven=ten fifty-five 8.half pa...

3.7

6-7/15-8/18 =6-(7×3/45+8/2×5/45) =6-(21/45+20/45) =6-41/45 =(6×45-41)/45 =229/45

网站地图

All rights reserved Powered by www.2616.net

copyright ©right 2010-2021。
www.2616.net内容来自网络,如有侵犯请联系客服。zhit325@qq.com