能简算的,用简便方法计算 2⼀3-1⼀4+3⼀8。 11⼀15—(3⼀4-2⼀3)

2024-11-02 14:41:40
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回答1:

能简算的,用简便方法计算
2/3-1/4+3/8
=2/3+(3/8-1/4)
=2/3+1/8
=19/24

11/15—(3/4-2/3)
=11/15+2/3-3/4
=7/5-3/4
=13/20