问题
选择题
计算28×0.25最简便的方法是( )
A.28×0.5×0.5
B.28×0.2+28×0.05
C.7×(4×0.25)
D.20×0.25+8×0.25
答案
28×0.25,
=7×(4×0.25),
=7×1,
=7.
故选:C.
计算28×0.25最简便的方法是( )
A.28×0.5×0.5
B.28×0.2+28×0.05
C.7×(4×0.25)
D.20×0.25+8×0.25
28×0.25,
=7×(4×0.25),
=7×1,
=7.
故选:C.