4又17分之7-(2又17分之7-2.375)
=4又17分之7-2又17分之7+2.375
=2+2.375
=4.375
2009×37+2009×64-2009
=2009*(37+64-1)
=2009*100
=200900
2又2分之1×0.678×40
=5/2×40×0.678
=100×0.678
=67.8
29分之40×18-11×29分之18+92
=18*(40/29-11/29)+92
=18*1+92
=18+92
=110
4又17分之7-(2又17分之7-2.375)
=4又17分之7-2又17分之7+2.375
=2+2.375
=4.375
2009×37+2009×64-2009
=2009*(37+64-1)
=2009*100
=200900
2又2分之1×0.678×40
=5/2×40×0.678
=100×0.678
=67.8
29分之40×18-11×29分之18+92
=18*(40/29-11/29)+92
=18*1+92
=18+92
=110