2.1乘以2.6+7.4乘以5.4+2.6乘以3.3求简便算法

2.1乘以2.6+7.4乘以5.4+2.6乘以3.3求简便算法 5.4乘以9.9+0.54 25乘以?乘以?等于（?乘以12）乘以（?乘以? 52乘以11.1减2.6乘以77.8简算 2.6乘以1.5加上0.15乘以34怎么简便 4.36乘以21+2.1乘以5.64 简便计算 198乘以0.51用简便计算怎样做还有40.7-2.6乘以9.3、5.2乘以10.1还有3.2乘以1.8+2.54、0.8乘以72.4乘以12.5、2.5乘以3.7+6.3乘以2.5 1.1乘以5.4等于多少 2.1乘以2/3等于 48=()乘以()乘以()乘以()乘以()乘以() 54=()乘以()乘以()乘以()乘以() 那么它们最小公倍数是（） 奥数题11.1乘以4除以9乘以3除以7.4乘以2 3.68乘以2.6+5.2乘以1.32-1.3乘以4 简算急用 100乘以(-2)乘以(-8)乘以0.01 9999乘以7778乘以3333乘以6666 0.25乘以5乘以4乘以125 2.1乘以8又二分之一乘以5.5乘以六又二分之一除以（六又五分之三乘以9.1乘以0.51）一定要巧算! 625乘以625乘以625乘以8乘以8乘以8乘以8乘以2乘以2乘以2乘以2乘以2 6.2乘以0.9乘以1.