
80÷9+100÷919如何巧算?
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80÷9+100÷919如何巧算?
80/9十100/919
=9一l/9+100/9l9
=9十(100/919一1/9)
=9十(900/919x9一919/9x9l9)
=9一l9/9x9l9
=9一19/827l
=8十8271/8271一19/8271
=8十8252/827l
等于8又8271分之8252
80/9十100/919
=9一l/9+100/9l9
=9十(100/919一1/9)
=9十(900/919x9一919/9x9l9)
=9一l9/9x9l9
=9一19/827l
=8十8271/8271一19/8271
=8十8252/827l
等于8又8271分之8252
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