Question

999.9x0.75+66.66x3+0.3333x150简便运算

Answer 1

999.9×0.75+66.66×3+0.3333×150

=99.99×7.5+66.66×3+33.33×1.5

=33.33×7.5×3+33.33×3×2+33.33×1.5

=33.33×（7.5×3+6+1.5）

=33.33×（22.5+1.5+6）

=33.33×30

=999.9

Answer 2

999.9x0.75+66.66x3+0.3333x150
=9.999x75+66.66x3+9.999x5
=9.999×(75+5)+66.66×3
=9.999×80+66.66×3
=99.99×8+66.66×3
=11.11×72+11.11×18
=11.11×(72+18)
=11.11×90
=999.9