一辆自行车轮胎外直径55厘米,如果自行车每分钟转120周,这辆自行车每小时能行多少千米?(得数保留整千米)
简算与计算 3600000÷125÷32÷25 1.25×6.78+25×3.47+125×0.0382 .
(1)7.2×1.43÷÷1.1(2)0.125×76.8+12.5×0.132+1.25(3)9(4).
0.23×56+2.3×440+0.46×0.5.
计算下列各题,能简便的要用简便方法计算.425÷1.25÷8 4.23÷3.6+7.4 0.75×996.3+3.7×2.5 4.28×11﹣4.28 12.5×3.2.
怎样简便就怎样算99999×22222+33333×33334 2003×2004÷2004×2004﹣2003×20042.8×(+) 101×9.81×10%+0.5×98.1+0.049×981 23×+14×.