用简便方法计算(1)0.75×14+0.25×14 (

用简便方法计算(1)0.75×14+0.25×14 (2)25×9.26×4 (3)99×2.45 (4)9.85×2.3+8.85×2.3.
2026年09月18日 03:57
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(1)0.75×14+0.25×14,
=(0.75+0.25)×14,
=1×14,
=14;

(2)25×9.26×4,
=9.26×(25×4),
=9.26×100,
=926;

(3)99×2.45,
=(100-1)×2.45,
=100×2.45-2.45,
=245-2.45,
=242.55;

(4)9.85×2.3+8.85×2.3,
=(9.85+8.85)×2.3,
=18.7×2.3,
=43.01.