Question

7.26×0.1﹢0.5×72.6+0.049×726怎么巧算

Answer 1

7.26×0.1﹢0.5×72.6+0.049×726
=7.26×0.1﹢5×7.26+4.9×7.26
=7.26x(0.1+5+4.9)
=7.26x10
=72.6