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82问答网 > 【简算】（111＋1⼀9）×9 1⼀3×4⼀9＋5⼀9÷3 （7⼀5-1⼀3）÷（1⼀3＋1⼀5）（9⼀16÷9＋9⼀16×1⼀9）÷5⼀8

【简算】（111＋1⼀9）×9 1⼀3×4⼀9＋5⼀9÷3 （7⼀5-1⼀3）÷（1⼀3＋1⼀5）（9⼀16÷9＋9⼀16×1⼀9）÷5⼀8

2025-03-15 10:24:26

推荐回答（1个）

回答1：

（111＋1/9）×9
=111×9+1/9×9
=999+1
=1000

1/3×4/9＋5/9÷3
=1/3×4/9+5/9×1/3
=1/3×（4/9+5/9）
=1/3×1
=1/3

（7/5-1/3）÷（1/3＋1/5）
=（7/5-1/3）×15/8
=7/5×15/8-1/3×15/8
=21/8-5/8
=2

（9/16÷9＋9/16×1/9）÷5/8
=(9/16×1/9+9/16×1/9)÷5/8
=9/16×1/9×2×8/5
=1/5

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