88+99等于几?八十八加九十九等于几?

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88+99等于几?
八十八加九十九等于几?

187

=87+1+99
=87+(1+99)
=87+100
=187

187

187

88+99
=(90-2)+(100-1)
=90-2+100-1
=190-3
=187