用递等式计算(能巧算的要巧算)2375-216÷18×2516×75×12532×81+81×682788÷(142×2-243)1001×29
用递等式计算(能巧算的要巧算)2375-216÷18×2516×75×12532×81+81×682788÷(142×2-243)1001×29-125×29×85600...
用递等式计算(能巧算的要巧算)2375-216÷18×2516×75×12532×81+81×682788÷(142×2-243)1001×29-125×29×85600÷[184+11×(453-397)].
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(1)2375-216÷18×25, =2375-12×25, =2375-300, =2075; (2)16×75×125, =2×8×75×125, =(2×75)×(8×125), =150×1000, =150000; (3)32×81+81×68, =(32+68)×81, =100×81, =8100; (4)2788÷(142×2-243), =2788÷(284-243), =2788÷41, =68; (5)1001×29-125×29×8, =(1001-125×8)×29, =(1001-1000)×29, =1×29, =29; (6)5600÷[184+11×(453-397)], =5600÷[184+11×56], =5600÷[184+616], =5600÷800, =7. |
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