15.37×7.88-9.37×7.38+1.537×21.2-93.7×0.262是简便计算

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15.37×7.88-9.37×7.38+1.537×21.2-93.7×0.262是简便计算

15.37×7.88-9.37×7.38+1.537×21.2-93.7×0.262是简便计算
15.37×7.88-9.37×7.38+1.537×21.2-93.7×0.262
是简便计算

15.37×7.88-9.37×7.38+1.537×21.2-93.7×0.262是简便计算
原式=15.37x7.88+1.537x21.2 - 9.37x7.38-93.7x0.262
=15.37x7.88+15.37x2.12 - (9.37x7.38+9.37x2.62)
=15.37x(7.88+2.12)- 9.37x(7.38+2.62)
=15.37x10-9.37x10
=(15.37-9.37)x10
=6x10
=60

15.37×7.88-9.37×7.38+1.537×21.2-93.7×0.262是简便计算 15.37*7.88-9.37*7.88+15.37*2.12-9.37*2.12简算 37*7.88-9.37*7.88+15.37*2.12-9.37*2.12 简便方法 15.37×7.88-9.37×7.88+15.37×2.12-9.37×2.12的简便计算 15.37*7.88-9.37*7.88-15.37*2.12+9.37*2.12= *=乘号要简便计算快 15.37*7.88-9.37*7.88-15.37*2.12+9.37*2.12的答案.要正确 15.37*7.88-9..37*7.88+15.37*2.12-9.37*2.12简便计算 15.37*7.88-9..37*7.88+15.37*2.12-9.37*2.12简便计算 14.37×7.88-9.37×7.38+1.437×21.2-93.7×0.262 14.37乘7.88—9.37乘7.38+1.437乘21.2—93.7乘0.262 急 6.2乘3.4+3.8乘1.9+3.8乘1.5(递等式巧算)15.37乘7.88-9.37乘7.38+1.537乘21.2-93.7乘0.262(递等式巧算)已知A=0.0000.(省略2000个0)0215,B=0.00000.(省略2004个0)08,求A乘B(思考题) 三道数学题 !急哇 !第一题:0.3+0.42+0.54+0.66+……+5.1第二题:2.22×9.9+6.66×6.7 第三题:15.37×7.88-9.37×7.88-15.37×2.12+9.37×2.12 求解答 明天要交上的啊 0w0 ... 选一个做吧【用简便方法做】1.15.37乘7.88减9.37乘7.88减15.37乘2.12加9.37乘2.122.80.35乘0.25加4.197乘2.5加0.2903乘25加0.0865乘25 简算:15.37*7.98-9.37*7.98+15.37*2.11-0.937*21.1 简算:15.37*7.98-9.37*7.98+15.37*2.11-1.937*21.1 下面这些题的答案是?12.3.704小数点后面第100位上的数字是( ).13.1993×199.2-1992×199.1=( ) 14.15.37×7.88-9.37×7.88-15.37×2.12+9.37×2.12=( ) 15.有甲、乙、丙三人,甲每分钟走50米,乙每分钟走40米,丙每分钟 15.37*7.89-9.37*7.89+15.37*2.11-9.37*2.11怎样简算? 15.37x7.88-9.37x7.88+15.37x2.12-9.37x2.12=