154-(54 98)怎样简便计算
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154-(54 98)怎样简便计算
括号前面是减号,去括号要变符号.
154-(54+98)
=154-54-98
=100-98
=2
154-(54+98)
=154-54-98
=100-98
=2
154-(54 98)怎样简便计算
括号前面是减号,去括号要变符号.
154-(54+98)
=154-54-98
=100-98
=2
154-(54+98)
=154-54-98
=100-98
=2