数学整数巧算1.1111111188888888÷999999992.12345679*87654321-8765432
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数学整数巧算
1.1111111188888888÷99999999
2.12345679*87654321-87654322*12345678
1.1111111188888888÷99999999
2.12345679*87654321-87654322*12345678
![数学整数巧算1.1111111188888888÷999999992.12345679*87654321-8765432](/uploads/image/z/10152002-2-2.jpg?t=%E6%95%B0%E5%AD%A6%E6%95%B4%E6%95%B0%E5%B7%A7%E7%AE%971.1111111188888888%C3%B7999999992.12345679%2A87654321-8765432)
1、1111111188888888÷99999999
=(1111111100000000+88888888)÷99999999
=(1111111100000000÷11111111+88888888÷11111111)÷(99999999÷11111111)
=(100000000+8)÷9
=100000008÷9
=11111112
2、12345679*87654321-87654322*12345678
=(12345678+1)*87654321-(87654321+1)*12345678
=12345678*87654321+1*87654321-87654321*12345678-1*12345678
=87654321-12345678=75308643
=(1111111100000000+88888888)÷99999999
=(1111111100000000÷11111111+88888888÷11111111)÷(99999999÷11111111)
=(100000000+8)÷9
=100000008÷9
=11111112
2、12345679*87654321-87654322*12345678
=(12345678+1)*87654321-(87654321+1)*12345678
=12345678*87654321+1*87654321-87654321*12345678-1*12345678
=87654321-12345678=75308643