出20道小数简便算法并解答写出详细过程

2.5×7.1×4
16.12×99+16.12
5.2×0.9+0.9
7.28×99+7.28
4.3×50×0.2
64-2.64×0.5
26×15.7+15.7×24
(2.275 +0.625)×0.28
3.94+34.3×0.2
1.2×(9.6÷2.4)÷4.8
8.9×1.1×4.7
2.7×5.4×3.9
3.6×9.85-5.46
8.05×3.4+7.6
6.58×4.5×0.9
2.8×0.5+1.58

25×42×4 357+288+143 88×27+27×12 38×99+38 101×75 75×98 25×(4+8) 125×4×8×25 17+145+23+35 400−256−44 272+68+28 68×125×8 4×39×25 4×25+16×25 4× (25+15) 125×6×8 36×99 39×25×4 500−273−227 123+330+287

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