根据算式填入正确的基数词完成句子。 1. 16 + 20 = ? What's ____________ and ____________? It's ____________. 2. 65 + 25 = ? What's ____________ and ____________? It's ____________. 3. 35 -6 = ? What's ____________ minus ____________? It's ____________. 4. 7 × 9 = ? What's ____________ times ____________? It's ____________. 5. 81 ÷ 3 = ? What's ____________ divided by ____________? It's ____________.