5点3Ⅹ12点6-0点53X26=0.53×126-0.53×26=0.53×（126-26）=0.53×100=53
5.3x12.6-0.53x26=5.3x12.6-5.3x2.6=5.3x(12.6-2.6)=5.3x10=53希望帮到你 望采纳 谢谢 加油
5.3×12.6-0.53×26=5.3×（12.6-2.6）=5.3×10=53
