Question

1.5×8.4＋3＋15×10％肿么简算.

Answer 1

1.5x8.4+3x0.3+15x10%

=1.5x8.4+(3/2)x2x0.3+15x10%

=1.5x8.4+1.5x0.6+15x0.1

=1.5x(8.4+0.6+1)

=1.5x(9+1)

=1.5x10

=15