Question

4.8x3.9+6.1x0.8简算

Answer 1

4.8x3.9+6.1x0.8
=4.8x3.9+（10-3.9）x0.8
=4.8x3.9+10x0.8-3.9x0.8
=10x0.8+3.9x（4.8-0.8）
=8+3.9x4
=8+15.6
=23.6