9.8ⅹ1.2-4.9简便方法
3个回答
展开全部
9.8×1.2-4.9
=9.8×1.2-9.8×0.5
=9.8×(1.2-0.5)
=9.8×0.7
=6.86
=9.8×1.2-9.8×0.5
=9.8×(1.2-0.5)
=9.8×0.7
=6.86
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
展开全部
9.8×1.2-4.9
=4.9×2×1.2-4.9
=4.9×2.4-4.9
=4.9×(2.4-1)
=4.9×1.4
=(5-0.1)×1.4
=5×1.4-0.1×1.4
=5×(1+0.4)-0.14
=5×1+5×0.4-0.14
=5+2-0.14
=7-0.14
=6.86
=4.9×2×1.2-4.9
=4.9×2.4-4.9
=4.9×(2.4-1)
=4.9×1.4
=(5-0.1)×1.4
=5×1.4-0.1×1.4
=5×(1+0.4)-0.14
=5×1+5×0.4-0.14
=5+2-0.14
=7-0.14
=6.86
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
展开全部
=4.9x2x1.2-4.9x1
=4.9x2.4-4.9x1
=4.9x(2.4-1)
=4.9x1.4
=6.86
=4.9x2.4-4.9x1
=4.9x(2.4-1)
=4.9x1.4
=6.86
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询