在方框里填上合适的数
(100+?÷4)×4=480怎么写?
人气:159 ℃ 时间:2020-01-31 03:30:03
解答
(100+80÷4)×4=480
(100+?÷4)×4=480
100+?÷4=480÷4
100+?÷4=120
?÷4=120-100
?÷4=20
?=20×4
?=80
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