Question

2.25*53+1.75*0.6+6简便运算

Answer 1

2.25*53+1.75*0.6+6 简便运算

=(9/4)×53 + (7/4)×0.6 + 6 //:小数、分数转化；眼观；心算

=(9×53+4.2)/4+6

=(8×53+57.2)/4+6

=106+14.3+6

=126.3