1.41.2×8.1+11×9.25+537×0.19
问题描述:
1.41.2×8.1+11×9.25+537×0.19
2.55555×666667+44445×666666-155555
3.0.4×[11/52÷2又3/4×(4.3-1.8)]×26
4.(2×4×8×16×32)×(25×6.25×1.25×0.25)
5.85.42×7903.29-286.5×790.329+79032.9×4.323
6.1.135+2.246+3.346+4.475+5.557+6.768+7.768+8.979+9.979
7.1/18+1/54+1/108+1/270+1/378+1/504+1/648+1/810+1/990
8.(1+1)/2+(2-1)/2²+(3-1)/2³+…+(100-1)/2的一百次方
9.(1-1/2-1/3-…-1/1999)×(1/2+1/3+1/4+…+1/2000)-[(1-1/2-1/3-…-1/2000)(1/2+1/3+…+1/1999)]
10.20-{[(2²+1)/(2²-1)]+[(3²+1)/(3²-1)]+[(4²+1)/(4²-1)]+…+[(20²+1)/(20²-1)]}
答
1:原式=41.2*(10-1.9)+11*9.25+53.7*1.9=412+11*(10-0.75)+12.5*1.9=412+110-1.1*7.5+(20-7.5)*1.9=412+110+20*1.9-(1.1*7.5+1.9*7.5)=412+110+38-3*7.5=560-22.5=537.5 2:55555*666667+44445*666666-1555...