999.6+999.7+999.8+1000.8+1000.7+1000.6简便运算
问题描述:
999.6+999.7+999.8+1000.8+1000.7+1000.6简便运算
答
999.6+999.7+999.8+1000.8+1000.7+1000.6=1000-0.4+1000-0.3+1000-0.2+1000+0.8+1000+0.7+1000+0.6=6000+2.1-0.9=6001.2
答
999.6+999.7+999.8+1000.8+1000.7+1000.6
=(1000-0.4)+(1000-0.3)+(1000-0.2)+(1000+0.8)+(1000+0.7)+(1000+0.6)
=6×1000+(0.8+0.7+0.6-0.4-0.3-0.2)
=6000+1.2
=6001.2
答
999.6+999.7+999.8+1000.8+1000.7+1000.6
=1000*6-0.4-0.3-0.2+0.8+0.7+0.6
=6000+1.2
=6001.2