看谁算得又对又快 1.425÷(3.8×0.5) 2.25÷7.5×(3.2÷2.5) 15.6÷24÷0.2 30.8÷[8×(5.
看谁算得又对又快1.425÷(3.8×0.5)2.25÷7.5×(3.2÷2.5)15.6÷24÷0.230.8÷[8×(5.09-4.59)][5.7+(18-3.5)...
看谁算得又对又快 1.425÷(3.8×0.5) 2.25÷7.5×(3.2÷2.5) 15.6÷24÷0.2 30.8÷[8×(5.09-4.59)] [5.7+(18-3.5)]÷0.05 49.6÷[20-(11.2+2.6)].
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(1)1.425÷(3.8×0.5) =1.425÷1.9 =0.75; (2)2.25÷7.5×(3.2÷2.5) =2.25÷7.5×1.28 =0.3×1.28 =0.384; (3)15.6÷24÷0.2 =0.65÷0.2 =3.25; (4)30.8÷[8×(5.09-4.59)] =30.8÷[8×0.5] =30.8÷4 =7.7; (5)[5.7+(18-3.5)]÷0.05 =[5.7+14.5]÷0.05 =20.2÷0.05 =404; (6)49.6÷[20-(11.2+2.6)] =49.6÷[20-13.8] =49.6÷6.2 =8. |
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