7.81减去7.7除以0.7再乘以5.2的简便运算

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7.81减去7.7除以0.7再乘以5.2的简便运算7.81减去7.7除以0.7再乘以5.2的简便运算7.81减去7.7除以0.7再乘以5.2的简便运算7.81-7.7÷0.7×5.2=7.81-11×

7.81减去7.7除以0.7再乘以5.2的简便运算
7.81减去7.7除以0.7再乘以5.2的简便运算

7.81减去7.7除以0.7再乘以5.2的简便运算
7.81-7.7÷0.7×5.2
=7.81-11×5.2
=7.81-57.2
=-49.39

7.81-7.7÷0.7×5.2
=7.81-11×5.2
=7.81-57.2
=-49.39

7.81-7.7÷0.7×5.2
=7.81-11×5.2
=7.81-57.2
=-49.39

7.81-7.7÷0.7×5.2
=7.81-11×5.2
=7.81-57.2
=-49.39

7.81-7.7÷0.7×5.2
=7.81-11×5.2
=7.81-57.2
=-49.39

简便运算????

7.81-7.7÷0.7×5.2
=7.81-11×5.2
=7.81-57.2
=-49.39