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试题原文 |
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(1)2.3×7.6+2.3×12.4, =2.3×(7.6+12.4), =2.3×20, =46; (2)1.25×3.2, =1.25×8×0.4, =(1.25×8)×0.4, =10×0.4, =4; (3)8.3×0.125×8, =8.3×(0.125×8), =8.3×1, =8.3; (4)5.9×101-5.9, =5.9×(101-1), =5.9×100, =590; (5)1.35+0.89+2.11, =1.35+(0.89+2.11), =1.35+3, =4.35; (6)5.12-3.43+2.88, =(5.12+2.88)-3.43, =8-3.43, =4.57. |
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