这些用简便计算怎么做?(1)99*0.43 (2)6.11-7/32-(1又4/11*8/15+1又4/11*7/15)_数学解答

这些用简便计算怎么做?(1)99*0.43 (2)6.11-7/32-(1又4/11*8/15+1又4/11*7/15)

人气：447 ℃　时间：2020-06-14 09:01:28

解答

(1)99*0.43
=0.43*(100-1)
=0.43*100-0.43*1
=43-0.43
=42.57
(2)6.11-7/32-(1又4/11*8/15+1又4/11*7/15)
=6.11-7/32-[1又4/11*(8/15+7/15)]
=6.11-7/32-15/11