Question

0.36*1.5-0.45的简便运算？

0.25Ⅹ2.53十0.25Ⅹ1.47

Answer 1

0.36*1.5-0.45
=0.09*4*1.5-0.09*5
=0.09*（4*1.5-5）
=0.09*（6-5）
=0.09*1
=0.09
————
0.25Ⅹ2.53十0.25Ⅹ1.47
=0.25Ⅹ（2.53十1.47）
=0.25Ⅹ4
=1

Answer 2

0.36×1.5-0.45
=0.36×1.5-0.3×1.5
=（0.36-0.3）×1.5
=0.06×1.5
=0.09。