UC知道7.2×6+17×2.8
来源：百度知道 编辑：UC知道 时间：2024/05/19 07:01:02
用简便方法计算
6*7.2+17*2.8
=6*7.2+6*2.8+11*2.8
=60+11*2.8
=90.8
7.2×6+17×2.8
=7.2×6+2.8×6+2.8×10+2.8×1
=6×(7.2+2.8)+28+2.8
=60+28+2.8
=90.8
原式=7.2*6+2.8*（6+11）=7.2*6+2.8*6+2.8*11=（7.2+2.8）*6+11*2.8=60+10*2.8+2.8=90.8
（7.2+2.8）*6+11*3-11*0.2=93-2.2=90.8
7.2*6+17*2.8=7*6+17*3+0.2*6-0.2*17=93-2.2=90.8
6*7.2+17*2.8
=6*7.2+6*2.8+(10+1)*2.8
=60*(7.2+2.8)+28+2.8
=60+28+2.8
=90.8
7.2 X 6+17 X 2.8=7.2 X 6+2.8 X 6+11 X 2.8=(7.2+2.8)*6+2.8 X 10 +2.8=60+28+2.8=90.8