2037-2037÷21
=2037-97
=1940
4357+884÷26×25
=4357+34×25
=4357+850
=5207
800-345÷15×8+263
=800-23×8+263
=800-178+263
=885
5+（5.6-4.8）×13
=5+0.8×13
=5+10.4
=15.4
[9.2+0.8×（9-7.75）]÷0.4
=9.2÷0.4+2×1.25
=23+2.5
=25.5
[17.1-17.1÷（3.1-0.7）]×0.6
=17.1×(1-2.4分之1)×0.6
=17.1×12分之7×0.6
=17.1×20分之7
=5.985
12.48÷（32×8分之3+3.6）
=12.48÷(12+3.6)
=12.48÷15.6
=0.8
十五分之四÷（一又九分之四-三分之二×六分之五）+六分之五
=15分之4÷(9分之13-9分之5)+6分之5
=15分之4÷(9分之8)+6分之5
=10分之3+6分之5
=15分之17
2.9×（3.8-五分之四）÷（2.375-一又八分之五）
=2.9×(3.8-0.8)÷(2.375-1.625)
=2.9×3÷0.75
=11.6
1110÷[56×（七分之三-八分之三）]
=1110÷(56×56分之3)
=1110÷3
=370
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