问题
选择题
1089减去45的4倍的差再除以9,商是多少?( )
A.(1089-45×4)÷9
B.1089-45×4÷9
C.(1089-45)×4÷9
D.1089-(45×4)÷9
答案
(1089-45×4)÷9,
=(1089-180)÷9,
=909÷9,
=101.
故选:A.
1089减去45的4倍的差再除以9,商是多少?( )
A.(1089-45×4)÷9
B.1089-45×4÷9
C.(1089-45)×4÷9
D.1089-(45×4)÷9
(1089-45×4)÷9,
=(1089-180)÷9,
=909÷9,
=101.
故选:A.