这几道题的简便算法以及得数
来源:学生作业帮 编辑:搜搜考试网作业帮 分类:数学作业 时间:2024/08/03 11:40:41
这几道题的简便算法以及得数
456-299,456+109,456-109,23+45+55+77,891-238-562,571-(271-48),56.5-41.2+43.5-58.8,25×125×5×2×4×8,25×1.6,125×72,47×56+44×47,99×45,101×45,9.9×45+4.5,101×45-45,56×11 37×12+12×56+12×7,75×21+25×37,120×(1/2+1/3+1/4),25×1/3×3/5×3/10,2007×2005/2006,
456-299,456+109,456-109,23+45+55+77,891-238-562,571-(271-48),56.5-41.2+43.5-58.8,25×125×5×2×4×8,25×1.6,125×72,47×56+44×47,99×45,101×45,9.9×45+4.5,101×45-45,56×11 37×12+12×56+12×7,75×21+25×37,120×(1/2+1/3+1/4),25×1/3×3/5×3/10,2007×2005/2006,
![这几道题的简便算法以及得数](/uploads/image/z/6262223-23-3.jpg?t=%E8%BF%99%E5%87%A0%E9%81%93%E9%A2%98%E7%9A%84%E7%AE%80%E4%BE%BF%E7%AE%97%E6%B3%95%E4%BB%A5%E5%8F%8A%E5%BE%97%E6%95%B0)
456-299=456-300+1=257 剩下的题目做法类似,凑整数.