Tính (theo mẫu):
Mẫu: 125g + 38g = 163g
a) 235g + 17g b) 18g ⨯ 5
450g – 150g 84g : 4
60g – 25g + 14g
a) 235g + 17g = 252g
450g – 150g = 300g
60g – 25g + 14g = 49g
b) 18g ⨯ 5 = 90g
84g : 4 = 21g
-- Mod Toán lớp 3
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