Question

3.53*4.72+4.83*3.53+0.45*3.53 4.42*0.99+0.0442 这两道题的简便算法.

Answer 1

3.53*4.72+4.83*3.53+0.45*3.53

=3.53*(4.72+4.83+0.45)

=3.53*10

=35.3

4.42*0.99+0.0442

=4.42*(0.99+0.01)

=4.42*1

=4.42