0.56×8.4-5.6×0.74
=0.56×8.4-0.56×7.4
=0.56×(8.4-7.4)
=0.56×1=0.56。
这道题应该是非常的简单。只需要把5.6变成0.56,把0.74变成7.4就可以。
0.56×8.4-5.6×0.74
=5.6×0.84-5.6×0.74
=5.6×(0.84-0.74)
=5.6×0.1
=0.56
0.56x8.4-5.6x0.74
=0.56x10x8.4➗10-5.6x0.74
=5.6x0.84-5.6x0.74
=5.6x(0.84-0.74)
=5.6x0.1
=0.56