
用简便方法计算. 28.75-5.37-4.63
用简便方法计算.28.75-5.37-4.637000÷8÷12557×83+83×4348×25....
用简便方法计算. 28.75-5.37-4.63 7000÷8÷125 57×83+83×43 48×25.
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(1)28.75-5.37-4.63, =28.75-(5.37+4.63), =28.75-10, =18.75; (2)7000÷8÷125, =7000÷(8×125), =7000÷1000, =7; (3)57×83+83×43, =(57+43)×83, =100×83, =8300; (4)48×25, =12×(4×25), =12×100, =1200. |
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