A) 60 + 5 = 15 + 3 + 1 = 29 – 3 = 62 + 3 = 25 + 1 + 3 = 77 – 7 – 0 =50...

câu 2: - DE VA DAP AN KT CK2 H1 TOAN 20092010
Toán DE VA DAP AN KT CK2 H1 TOAN 20092010
Câu 2: a) 60 + 5 = 15 + 3 + 1 = 29 – 3 = 62 + 3 = 25 + 1 + 3 = 77 – 7 – 0 =50 + 30 = 34 + 1 + 3 = 68 – 1 – 1 =88 – 1 – 1 = b) 33 70 87 94 98++ _ _ _45 26 23 34 18