2.9+29乘以29怎么用简便方法做?
45乘以[3乘以37]用简便方法怎么做
0.78加7.8乘以9.9用简便方法怎么做
103乘以99用简便方法怎么做
7.45乘以0.99用简便方法计算怎么做
7.6乘以7.3加上1.9乘以4乘以7.3用简便方法计算怎么做?
2.5乘以0.6减去1.8乘以0.5用简便方法怎么做
37乘以8除以37乘以8用简便方法怎么做?
12乘以6+72乘以49用简便方法怎么做
262乘以100减62乘以2用简便方法怎么做?
8.3乘以2.4加83乘以0.76用简便方法怎么做
这题用简便方法怎么做32.2乘以0.4加178乘以0.044.83乘以7.5加75乘以0.51要有步骤用简便方法
103乘以87减去29乘以9怎样用简便方法做