1.5×8.4+3+15×10%肿么简算.

问题描述:

1.5×8.4+3+15×10%肿么简算.
1.5×8.4+3×0.3+15×10%

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