Half the cans collected by Martha is 90/2 = <<90/2=45>>45
So, Diego collected 45 + 10 =<<45+10=55>>55 cans.
Martha and Diego collected 90 + 55 = <<90+55=145>>145 cans together.
Thus, they need to collect 150 - 145 = <<150-145=5>>5 more cans.
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