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用喜欢的方法计算下面各题.2.8×4.5+5.5×2.8930÷5÷0.6(2.25+27.75÷1.5)×1.612.5×2.5×3.23.5×0.99(3.168+1.9)÷(10-9.44)

题目详情
用喜欢的方法计算下面各题.
2.8×4.5+5.5×2.8930÷5÷0.6(2.25+27.75÷1.5)×1.6
12.5×2.5×3.23.5×0.99(3.168+1.9)÷(10-9.44)
▼优质解答
答案和解析
①2.8×4.5+5.5×2.8
=2.8×(4.5+5.5)
=2.8×10
=28

②930÷5÷0.6
=930÷(5×0.6)
=930÷3
=310

③(2.25+27.75÷1.5)×1.6
=(2.25+18.5)×1.6
=20.75×1.6
=33.2

④12.5×2.5×3.2
=12.5×2.5×(0.8×4)
=(12.5×0.8)×(2.5×4)
=10×10
=100

⑤3.5×0.99
=3.5×(1-0.01)
=3.5×1-3.5×0.01
=3.5-0.035
=3.465

⑥(3.168+1.9)÷(10-9.44)
=5.068÷0.56
=9.05