简便计算 19.3÷50÷2 360÷（3+1.8） 3.4×12.5+6.6×12.5 2.6÷0.25÷0.13 25×7.8×0.4×0.2
展开全部
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.
=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.
已赞过
已踩过<
评论
收起
你对这个回答的评价是？
推荐律师服务：
若未解决您的问题，请您详细描述您的问题，通过百度律临进行免费专业咨询
