简便计算方法 1.99×37+99×45+83 2.26×13+18×52 3.78×36—36×36—36×2 4.125×(8+4)×25 1.99×37+99×45+832.26×13+18×523.78×36—36×36—36×24.125×(8+4)×25
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/08 22:06:18
![简便计算方法 1.99×37+99×45+83 2.26×13+18×52 3.78×36—36×36—36×2 4.125×(8+4)×25 1.99×37+99×45+832.26×13+18×523.78×36—36×36—36×24.125×(8+4)×25](/uploads/image/z/24015-39-5.jpg?t=%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%E6%96%B9%E6%B3%95+1.99%C3%9737%2B99%C3%9745%2B83+2.26%C3%9713%2B18%C3%9752+3.78%C3%9736%E2%80%9436%C3%9736%E2%80%9436%C3%972+4.125%C3%97%EF%BC%888%2B4%EF%BC%89%C3%9725+1.99%C3%9737%2B99%C3%9745%2B832.26%C3%9713%2B18%C3%97523.78%C3%9736%E2%80%9436%C3%9736%E2%80%9436%C3%9724.125%C3%97%EF%BC%888%2B4%EF%BC%89%C3%9725)
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简便计算方法 1.99×37+99×45+83 2.26×13+18×52 3.78×36—36×36—36×2 4.125×(8+4)×25 1.99×37+99×45+832.26×13+18×523.78×36—36×36—36×24.125×(8+4)×25
简便计算方法 1.99×37+99×45+83 2.26×13+18×52 3.78×36—36×36—36×2 4.125×(8+4)×25
1.99×37+99×45+83
2.26×13+18×52
3.78×36—36×36—36×2
4.125×(8+4)×25
简便计算方法 1.99×37+99×45+83 2.26×13+18×52 3.78×36—36×36—36×2 4.125×(8+4)×25 1.99×37+99×45+832.26×13+18×523.78×36—36×36—36×24.125×(8+4)×25
1.=99×83-99 83=8300-99=8300-100 1
2.=26×13 26×36=26×50-26
3.=(78-36-2)×36=40×36
4.=(125×8)×25 125×(4×25)