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0.5+5.2÷(3-2.5×7/8)
=1/2+11/2÷(3-25/10×7/8)
=1/2+11/2÷(3-35/16)
=1/2+11/2÷(48/16-35/16)
=1/2+11/2÷13/16
=1/2+11/2×16/13
=1/2+88/13
=13/26+176/26
=189/26
=7又26分之7
=1/2+11/2÷(3-25/10×7/8)
=1/2+11/2÷(3-35/16)
=1/2+11/2÷(48/16-35/16)
=1/2+11/2÷13/16
=1/2+11/2×16/13
=1/2+88/13
=13/26+176/26
=189/26
=7又26分之7
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