13 + 13 + 12 = 10 + 13 – 12 = 15 – 14 + 15 = 14 – 13 + 11=...

câu 1 : - BAI KIEM TRA LOP 2 DAU NAM
BAI KIEM TRA LOP 2 DAU NAM

Câu 1 : Tính :

13 + 13 + 12 = 10 + 13 – 12 =

15 – 14 + 15 = 14 – 13 + 11=

15 – 14 + 12 = 16 – 14 – 12 – 00 =