><8 + 9...9 + 8 18 + 9...19 + 8=7 + 8...6 + 7 36 - 6...12 + 187...

4/ - KIEM TRA MON TOAN LOP 2
Lớp 2 Toán KIEM TRA MON TOAN LOP 2
4/ 15cm + 7cm = ...?A. 22 B. 22cm C. 17cm D. 17