Question

一 98X102-44X25 356-47+153-56 56.8X2.6+26X4.32

Answer 1

56.8X2.6+26X4.32

＝56.8x2.6+2.6x43.2【--就是2.6x10x4.32】

=(56.8+43.2)x2.6

=100x2.6

=260

356-47+153-56

=356+153-(47+56)

=356+(153-103)

=406

98X102-44X25

=98x(100+2)-25x4x11

=98x100+98x2-100x11

=(98-11)x100+98x2

=8700+196

=8896