问题标题：
【简便计算19.3÷50÷2360÷（3+1.8）3.4×12.5+6.6×12.52.6÷0.25÷0.1325×7.8×0.4×0.2】
问题描述：
简便计算19.3÷50÷2360÷（3+1.8）3.4×12.5+6.6×12.52.6÷0.25÷0.1325×7.8×0.4×0.2
黄海伦回答：
19.3÷50÷2
=19.3÷（50×2）
=19.3÷100
=0.193.
360÷（3+1.8）
=360÷3+360÷1.8
=120+(360×10)÷(1.8×10)
=120+3600÷18
=120+200
=320.
3.4×12.5+6.6×12.5
=（3.4+6.6）×12.5
=10×12.5
=125.
2.6÷0.25÷0.13
=2.6÷0.13÷0.25
=[（2.6×100）÷（0.13×100）]÷(1/4)
=(260÷13)×4
=20×4
=80.
25×7.8×0.4×0.2
=(25×0.4)×0.2×7.8
=10×0.2×7.8
=2×7.8
=15.6.
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