15 + 20 = ?, THIRTY, FORTY, THIRTY-FIVE, 30 + 37 = ?, SEVEN, SIXTY-SEVEN, SEVENTY, 88 + 12 = ?, ONE HUNDRED, NINETY, SEVENTY-SIX, 90 + 3 = ?, NINETY-THREE, NINETY-SIX, EIGHTY-THREE, 58 + 3 = ?, SIXTY, FIFTY-ONE, SIXTY-ONE, 100 - 50 = ?, FIVE, FIFTEEN, FIFTY, 82 - 10 = ?, SEVENTY-TWO, SIXTY-TWO, NINETY-TWO, 70 - 35 = ?, THIRTY, THIRTEEN, THIRTY-FIVE, 47 - 17 = ?, TWENTY, THIRTY, FORTY, 96 - 16 = ?, EIGHT, EIGHTY, EIGHTEEN.

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