67 ÷7=____ 19×3 =____ 1+50%=____ 45×15 =____
34×15 ÷ 34×15 =____ 16 + 56 × 15 =____ 12 ×101- 12 =____ 34 ×9× 43 =____
“奇文共欣赏,疑义相于析。”陶渊明的诗句告诉我们,在学习上同学之间应该( )