1）3/8+5/8÷2==2)10-4/5x5/8 - 知识问答

1）3/8+5/8÷2==2)10-4/5x5/8==3)2/3÷[3/8÷(3/4-1/2)]==

3个回答

解
1）3/8+5/8÷2
=3/8+5/8×(1/2)
=3/8+5/16
=11/16
2)10-4/5x5/8
=10-1/2
=19/2
3)2/3÷[3/8÷(3/4-1/2)]
=2/3÷(3/8÷1/4)
=2/3÷(3/8×4)
=2/3÷3/2
=2/3×2/3
=4/9

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