Test paper of Unit 4, Volume 1, Mathematics of Grade Two, Beijing Normal University Edition (2)
Answer:
1. To find the sum of several identical addends, it is easier to calculate with ().
2.4×3= (), pronounced as (), calculated by formula ().
3.4+4+4+4+4=× 1+ 1+ 1+ 1+ 1+ 1=×
4. Fill in with "+","-"or "×".
55= 10 13=52 26= 12
5. According to the formula "368", two multiplication formulas can be written: () and ().
6. Write four multiplication formulas with the product of 18: (), (), (), ().