lzth.net
当前位置:首页 >> 72层34+67乘34r怎样算最简便????? >>

72层34+67乘34r怎样算最简便?????

72✘34+72✘67-72简便计算 72✘34+72✘67-72 =72*(34+67-1) =72*100 =7200

166x67+34+67 =166x67+67+34 =166*(67+1)+34 166*68+34 =332*34+34 =34*(332+1) =333*34 =(300+30+3)*34 =300*34+30*34+3*34 =11322

方法一,=(12.34+34.56)+(45.67+91.23)+(56.78+89.12)+(67.89+78.91)+23.45=46.9+136.9+145.9+146.8+23.45=499.95方法二,1+2+3+4+5+6+7+8+9=45 45(十位) 45(个位) 45(小数点后一位) 45(小数点后二位)+ .———————————— 499.95

67x67-34x34+67+34 =67x67+67-34x34+34 =67x(67+1)-34x(34-1) =67×68-34×33 =134×34-34×33 =34×(134-33) =34×101 =3434

2.68乘34.9除以34.9乘67.8除以2.68怎样列简便计算 =2.68/2.68x34.9/34.9x67.8 =1x1x67.8 =67.8

67×67+34×34+67+34 =(67+1)×67+(34+1)×34 =68×67+35×34 =34×(134+35) =34×169 =5746

67x34+67x66 =67x(34+66) =67x100 =6700

结合法第一题(367-67)-(25+75)+(66+34)=300 第二题为 125*(7+1)=125*8=1000

12+23-34+45-56+67-78+89 =12+(23+67)-(34+56)+45-78+89 =12+45-78+89 =57+11 =68

34+43+66+67 =34+66+(43+67) =100+110 =210 记住,1+9=10、2+8=10、3+7=10、4+6=10、5+5=10......

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