5.61×9.9×0.38÷(0.19×3又3/10×1.1)3又3/4×2.84÷3又3/5÷(1又1/2×1.42)×1又4/51998÷1998又1998/1999﹢1/20001/9×(3.47÷5/18-3.6+7.53×3又3/5)1又4/19×(18又2/3-3/4)+20又1/12÷19/23

问题描述:

5.61×9.9×0.38÷(0.19×3又3/10×1.1)
3又3/4×2.84÷3又3/5÷(1又1/2×1.42)×1又4/5
1998÷1998又1998/1999﹢1/2000
1/9×(3.47÷5/18-3.6+7.53×3又3/5)
1又4/19×(18又2/3-3/4)+20又1/12÷19/23

你好: 98989898×99999999÷10101010÷11111111 =(98989898÷10101010)×(99999999÷11111111) =9.8×9 =88.2 12.9÷0.72+43.5÷3.6 =64.5÷3.6

5.61×9.9×0.38÷(0.19×3又3/10×1.1)=5.1×3×2= 30.6
3又3/4×2.84÷3又3/5÷(1又1/2×1.42)×1又4/5=2.5×2×0.5= 2.5
1998÷1998又1998/1999﹢1/2000=1998×1999×2000÷(1998×1999)= 2000
1/9×(3.47÷5/18-3.6+7.53×3又3/5)=1/9×36= 4
1又4/19×(18又2/3-3/4)+20又1/12÷19/23= 23/19×(18-1/12+20+1/12)=23/19×38= 46