7.48+3.17-(2.48-6.83) 7.6x7/4+17.5x6/25 1333305/2x88+880x133339/4

问题描述:

7.48+3.17-(2.48-6.83) 7.6x7/4+17.5x6/25 1333305/2x88+880x133339/4
3.6x11.1+1.2x66.7 7.2x14.5+17x2.8 256x254/255+254x1/255
12.8x34.5+12.8x12.3+46.8x87.2

7.48+3.17-(2.48-6.83)=7.48-2.48+(3.17+6.83)=5+10=15 7.6x7/4+17.5x6/25 =7.6x1.75+1.75x2.4=(7.6+2.4)x1.75=10x1.75=17.51333305/2x88+880x133339/4=1333305x44+220x133339=1333305x44+44x666695=44x(1333305...