2.45乘以7.8+2.45乘以2.2=简算

2.45乘以7.8+2.45乘以2.2=简算 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（） 2.45乘以0.16乘以80怎么简便法? 7.8乘以4.2加2.2乘以4.2等于(7.8+2.2)乘以4.2这是根据( )简算 =3乘以2乘以1,=4乘以3乘以2乘以1,=5乘以4乘以3乘以2乘以1,那么100!除以99! 0.25乘以1.25乘以8乘以40=简算 12乘以231=132乘以21 则 12乘以462= 乘以 ,18乘以891= 乘以 ,24乘以231= 乘以 .现在就要 1.36乘以4乘以2.5=简算 (-0.1)乘以(-100)乘以(-0.01)=? (-4)乘以（-7）乘以（-25)= -3.14乘以35.2+6.28乘以(-32.4)= 23乘以()+29乘以()=1999 125乘以4+25乘以8=? (-4)乘以5乘以（-0.25）=? 1.10.01乘以7.8怎样巧算 2.28.9乘以4除以289怎样巧算( )乘以（ ）=0.4 7.8乘以0.091乘以0.625除以（18.2乘以0.26乘以8分之1） 452乘以43= 5000乘以74=?