计算
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| (1)4.26+5.14+5.74+3.86 =(4.26+5.74)+(5.14+3.86) =10+9 =19; (2)0.2+99×0.82 =0.2+(100-1)×0.82 =0.2+100×0.82-0.82 =0.2+82-0.82 =81.38; (3)6÷0.3-0.3÷6 =20-0.05 =19.95; (4)1.3×[2÷(4.1-4.05)] =1.3×[2÷0.05] =1.3×40 =52. |
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