4.4×57.8+45.3×5.6越快解决越好

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4.4×57.8+45.3×5.6越快解决越好4.4×57.8+45.3×5.6越快解决越好4.4×57.8+45.3×5.6越快解决越好=4.4×(45.3+12.5)+45.3×5.6=4.4×4

4.4×57.8+45.3×5.6越快解决越好
4.4×57.8+45.3×5.6
越快解决越好

4.4×57.8+45.3×5.6越快解决越好
=4.4×(45.3+12.5)+45.3×5.6
=4.4×45.3+4.4×12.5+45.3×5.6
=45.3×(4.4+5.6)+11×0.4×2.5×5
=453+55
=508

4.4×57.8+45.3×5.6
=254.32+253.68
=508

507.36

=4.4×(45.3+12.5)+45.3×5.6
=4.4×45.3+4.4×12.5+45.3×5.6
=45.3×(4.4+5.6)+11×0.4×2.5×5
=453+55
=508