一年级90以内加法减法口算混合练习题五三天天练精华版（4）带答案

71-24=85-60=79-46 =79-23=37+34=38+19 =35+34=40+34=78-33 =76-51 =85-63 =72-12 =42+15 =43+25 =37+40 =4