3rd grade (Unit 5) - Maths

thirty-five - six = thirty-nine

six + four = ten

seven + fourteen = twenty-two

twelve + twenty = thirty-two

seventeen - six = eleven

twenty-one - six = sixteen

seventeen + six = twenty-four

fifty - fifteen = zero

eleven + twenty-nine = fifty

four + twenty-one = twenty-five

twenty-three - seven = sixteen

forty - fifteen = twenty-five