2.5×7×9.6×12.5这么巧算

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2.5×7×9.6×12.5这么巧算2.5×7×9.6×12.5这么巧算2.5×7×9.6×12.5这么巧算2.5×7×9.6×12.5=2.5×7×(4×2.4)×12.5=2.5×4×7×(2.4

2.5×7×9.6×12.5这么巧算
2.5×7×9.6×12.5这么巧算

2.5×7×9.6×12.5这么巧算
2.5×7×9.6×12.5
=2.5×7×(4×2.4)×12.5
=2.5×4×7×(2.4×12.5)
=70×(3×0.8×12.5)
=70×30
=2100