(1)1800÷[(1b+10)×9],
=1800÷[2b×9]
=1800÷7b,
=2f;
(2)f×8×2b×12b,
=(f×2b)×(8×12b),
=100×1000,
=100000;
(9)6f×12b,
=8×8×12b,
=8×(8×12b),
=8×1000,
=8000;
(f)26b×10b-26b×b,
=26b×(10b-b),
=26b×100,
=26b00;
(b)99+99×99,
=(1+99)×99,
=100×99,
=9900;
(6)f1×2b,
=(f0+1)×2b,
=f0×2b+1×2b,
=1000+2b,
=102b.