用简便方法计算4.76×9.8+4.76×
用简便方法计算4.76×9.8+4.76×0.23.74+6.09+6.26+3.913.75×2.5×0.46.64×1.2-2.64×1.2....
用简便方法计算4.76×9.8+4.76×0.2 3.74+6.09+6.26+3.91 3.75×2.5×0.4 6.64×1.2-2.64×1.2.
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(1)4.76×9.8+4.76×0.2,
=4.76×(9.8+0.2),
=4.76×10,
=47.6;
(2)3.74+6.09+6.26+3.91,
=(3.74+6.26)+(6.09+3.91),
=10+10,
=20;
(3)3.75×2.5×0.4,
=3.75×(2.5×0.4),
=2.75×1,
=2.75;
(4)6.64×1.2-2.64×1.2,
=(6.64-2.64)×1.2,
=4×1.2,
=4.8.
=4.76×(9.8+0.2),
=4.76×10,
=47.6;
(2)3.74+6.09+6.26+3.91,
=(3.74+6.26)+(6.09+3.91),
=10+10,
=20;
(3)3.75×2.5×0.4,
=3.75×(2.5×0.4),
=2.75×1,
=2.75;
(4)6.64×1.2-2.64×1.2,
=(6.64-2.64)×1.2,
=4×1.2,
=4.8.
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