51.8-4.8×(2.03-1.9)能不能简便运算?
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51.8-4.8×(2.03-1.9)
=51.8-4.8×0.13
=51.8-4.8×(0.1+0.03)
=51.8-4.8×0.1-4.8×0.03
=51.8-0.48-0.144
=51.32-0.144
=51.176
=51.8-4.8×0.13
=51.8-4.8×(0.1+0.03)
=51.8-4.8×0.1-4.8×0.03
=51.8-0.48-0.144
=51.32-0.144
=51.176
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