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题目
6.3×1/2÷(1.8+2.7×1/2) 0.56×(5/12-19/60+2.375)÷0.5
(4/9×2.4+1.6×4/19)×4/5

提问时间:2020-10-31

答案
6.3×1/2÷(1.8+2.7×1/2)
=6.3×1/2÷(1.8+1.35)
=3.15÷3.15
=1
0.56×(5/12-19/60+2.375)÷0.5
=0.56×(1/10+2.375)÷0.5
=0.56×2.475÷0.5
=1.386÷0.5
=2.772
(4/19×2.4+1.6×4/19)×4/5
=4/19×(2.4+1.6)×4/5
=4/19×4×4/5
=64/95
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