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试题原文 |
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(1)18.76×9.9+1.876, =18.76×9.9+18.76×0.1, =18.76×(9.9+0.1), =18.76×10, =187.6; (2)3.52÷2.5÷0.4, =3.52÷(2.5×0.4), =3.52÷1, =3.52; (3)3.65×10.1, =3.65×(10+0.1), =3.65×10+3.65×0.1, =36.5+0.365, =36.865; (4)1.25×2.5×32, =1.25×2.5×(4×8), =(1.25×8)×(2.5×4), =10×10, =100; (5)3.9-4.1+6.1-5.9, =(3.9+6.1)-(4.1+5.9), =10-10, =0; (6)3.75-(3.75+6.48), =3.75-3.75-6.48, =0-6.48, =-6.48; (7)15.6×13.1-15.6-15.6×2.1, =15.6×(13.1-1-2.1), =15.6×10, =156; (8)56.5×9.9+5.65, =5.65×99+5.65, =5.65×(99+1), =5.65×100, =565. |
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