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试题原文 |
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(1)(4.2-0.4×6)÷4, =(4.2-2.4)÷4, =1.8÷4, =0.45; (2)(15300÷600+67.5)×180, =(25.5+67.5)×180, =93×180, =16740; (3)10500÷(10500÷25×1.25), =10500÷(420×1.25) =10500÷525, =20; (4)(5.84-3.9)÷0.4+0.15×0.92, =1.94÷0.4+0.15×0.92, =4.85+0.138, =4.988; (5)(2400-480×2.5)÷1.6, =÷1.6, =1200÷1.6, =750; (6)0.32×12.5×250, =0.8×0.4×12.5×250, =(0.8×12.5)×(250×0.4), =10×100, =1000; (7)2.4×5.5+2.4×3.5+2.4, =(5.5+3.5+1)×2.4, =10×2.4, =24; (8)9.825×0.2+98.25×0.09-0.393÷0.4, =9.825×0.2+9.825×0.9-9.825×0.1, =(0.2+0.9-0.1)×9.825, =1×9.825, =9.825. |
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