rmml.net
当前位置:首页 >> 用简便方法计算25加26加27连续加到75 >>

用简便方法计算25加26加27连续加到75

25+75=100 26+74=100 25到75一共有51个数 所以有25对这样的组合加最中间的一个数50 所以结果是25×100+50=2550

25 + 26 + 27 + 28 + 29 = 25 + 29 + 26 + 28 + 27 = 27 x 5 = 135 还有: 25 + 26 + 27 + 28 + 29 = (25 + 29)/ 2 x 5 = 135

解:注意到:25+29=27×2,26+28=27×2 ,故有: 25+26+27+28+29 =27×5 =135

203x23 =(200+3)x23 =200x23+3x23 =4600+69 =4669 25x75x4 =25x4x75 =100x75 =7500 38x27+27x62 =27x(38+62) =27x100 =2700

简便运算: (27+73)×75 =(20+70+3+7)×75 =(90+10)×75 =100×75 =7500 答题不易,仅供参考,望采纳~~~

27乘75加73乘75简便计算 27乘75加73乘75 =75*(27+——73) =75*100 =7500

159*27+27 =(159+1)*27 =160*27 =4320

27.38减5.34加4.66用简便方法怎么计算 27.38-5.34+4.66 =22.04+4.66 =26.7 直接计算 如果题目是:27.38减5.34加4.66的和用简便方法怎么计算 27.38-(5.34+4.66) =27.38-10 =17.38

27×49加27×42加76×9用简便方法怎么做 27×49加27×42加76×9 =27*(49+42+9) =27*100 =2700

27×99+27 =27×(99+1) =27×100 =2700

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