88.8×8.7+11.2×9.9-11.2×1.2的简便运算怎么做?
=88.8×8.7+11.2×8.7 =(88.8+11.2)×8.7 =100×8.7 =870
88.8x8.7+11.2x9.9-11.2x1.2简便计算
解题思路:四则运算规则(按顺序计算,先算乘除后算加减,有括号先算括号,有乘方先算乘方)即脱式运算(递等式计算)需在该原则前提下进行 解题过程:88.8×8.7+11.2×9.9-11.2×1.2 =88.8×8.7+11.2×(9.9-1.2)=(88.8+11.2)×8.7 =100×8.7 =870 ...
88.8X8.7十11.2X9.9一11.2X1.2简便筫法学啥?
简便计算为 88.8*8.7+11.2*9.9-11.2*1.2 =88.8*8.7+11.2*(9.9-1.2)=88.8*8.7+11.2*8.7 =(88.8+11.2)*8.7 =100*8.7 =870
88.8x8.7+ 11.2x9.9-11.2x1.2巧算
88.8x8.7+11.2x(9.9-1.2)=88.8x8.7+11.2x8.7 =8.7x(88.8+11.2)=8.7x100 =870 请采纳,你的采纳是我上进的动力!可以追问,一直到懂!!
用简便方法计算88点八乘八点七加十一点二乘九点九点十一点二乘一点二...
88.8*8.7+11.2*9.9+11.2*1.2 =(100-11.2)*8.7+11.2*(9.9+1.2)=100*8.7-11.2*8.7+11.2*11.1 =870+11.2*(11.1-8.7)=870+11.2*2.4 =870+11.2*(2+0.4)=870+22.4+4.48 =896.88
88.8*8.7+11.2*9.9-11.2*1.2怎么做
88.8*8.7+11.2(9.9-1.2) = 88.8*8.7+11.2*8.7 = 8.7(88.8+11.2)=8.7*100 = 870
88.8X8.7+11.2X99-11.2X1.2等于多少。用简便算法计算
把学生数加上7,可知总数是3和5的倍数,除以7后还是余4,设加上7后总数是15n,即15,30,45,60等数字,可以看出60除以7余4,所以60-7=53就是所求的数。这个班至少有53人 .
求解,要简便运算,有过程,速回,谢谢
解:88.8×8.7+11.2×9.9-11.2×1.2 =88.8×8.7+11.2×(9.9-1.2)=88.8×8.7+11.2×8.7 =8.7×(88.8+11.2)=8.7×100 =870
888x8.7十11.2x9.9一11.2x1.2简便计算
7 =899.2x8.7 =7823.04 如果是考简便元算的话,个人觉得,前面不应该是888,而应该是88.8最合适!如果是88.8的话:88.8x8.7+11.2x9.9-11.2x1.2 =88.8x8.7+11.2x(9.9-1.2)=88.8x8.7+11.2x8.7 =(88.8+11.2)x8.7 =100x8.7 =870 这样更符合简便运算的规律~!
8.88x8.7+11.2x9.9+1.12x12巧算
8.88×8.7+11.2×9.9+1.12×12 =8.88×8.7+11.2×9.9+11.2×1.2 =8.88×8.7+11.2×﹙9.9+1.2﹚=8.88×8.7+11.2×11.1 =88.8×0.87+11.2×11.1 =11.1×8×0.87+11.2×11.1 =11.1×﹙6.96+11.2﹚=11.1×18.16 =201.576 ...