fkjj.net
当前位置:首页 >> 6%3/2%7/6/12!/20简便运算。 >>

6%3/2%7/6/12!/20简便运算。

6-3/2-7/6-13/12-21/20=6-1- 1/2 - 1 - 1/6 - 1- 1/12 - 1- 1/20=1-(1-1/2+1/2-1/3+1/3-1/4+1/4-1/5)=1-4/5=1/5

(-7.7)+(-2.3)-(-12.6)=[(-7.7)+(-2.3)]+12.6=(-10)+12.6=12.6-10=2.6

3/2+7/6+13/12+21/20+31/30=5+(1/2+1/6+1/12+1/20+1/30)=1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+5=1-1/6+5=5/6+5=35/6

应该是13/12吧3/2+7/6+13/12+21/20+31/30=1+1/2+1+1/6+1+1/12+1+1/20+1+1/30=5+(1-1/2)+(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+(1/5-1/6)=5+1-1/6=6-1/6=35/6

(1)11*25-68 (2)22*36*82 (3)98*36-14 (4)39+68*120 (5)55*108 (6)92*72/3*2 (7)9.85*2.36 (8)3.875*2.3 (9)36.9*25-6+99 (10)39*28/21 (11)98*63.5-2.65 (12)(25%-695%-12%)*36 (13)3/4*3/5+3/4*2/5 (14)(1-1/4+8/9)/7/9 (15)2/3+1/6/3/24+2/21 (16)1*

1 25%*((23+2%)*4) 2 (30+20%)/2 3 12*3/(25+20%) 4 30/(3+40%) 5 27/8*16*10% 6 36*(1-75%) 7 (0.75+0.2)/0.25*25% 8 35/2*75% 9 (54+10%)/20 10 25/3*18)*30% 11 (2+70%)*40 12 25%*((23+2%)*4) 13. (30+20%)/2 14. 12*3/(25+20%) 15 10.9-

原式=3.8x0.2+6.2x0.1=3.8x0.1x2+6.2x0.1=3.8x0.1+3.8x0.1+6.2x0.1=0.38+(3.8+6.2)x0.1=0.38+10x0.1=0.38+1=1.38供参考.

十二点3*6点7+7点7*6点七= (12.3+7.7)* 6.7 = 20*6.7= 134

您好:3/2-5/6+7/12-9/20+11/30-13/42=(1+1/2)-(1/2+1/3)+(1/3+1/4)-(1/4+1/5)+(1/5+1/6)-(1/6+1/7)=1-1/7=6/7 如果本题有什么不明白可以追问,如果满意记得采纳 如果有其他问题请另发或点击向我求助,答题不易,请谅解,谢谢.祝学习进步!

解:6%/(0.75%/0.5)=3/0.75=300/75=4

相关文档
网站首页 | 网站地图
All rights reserved Powered by www.fkjj.net
copyright ©right 2010-2021。
内容来自网络,如有侵犯请联系客服。zhit325@qq.com