用递等式计算并用计算器验算.(1)53-62+79.89-15.56(2)78.37+(132.25-29.18)(3)262.39-87.25-18.
用递等式计算并用计算器验算.(1)53-62+79.89-15.56(2)78.37+(132.25-29.18)(3)262.39-87.25-18.36(4)198....
用递等式计算并用计算器验算.(1)53-62+79.89-15.56(2)78.37+(132.25-29.18)(3)262.39-87.25-18.36(4)198.2-(250.62-180.35)
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(1)53-62+79.89-15.56, =-9+79.89-15.56, =70.89-15.56, =55.33; (2)78.37+(132.25-29.18), =78.37+103.07, =181.44; (3)262.39-87.25-18.36, =175.14-18.36, =156.78; (4)198.2-(250.62-180.35), =198.2-70.27, =127.93. |
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