Tính 2cm × 2 = . 12cm : 2 2cm × 6 =. 2cm × 5 + 4cm = 2dm × 7 =
Giải thích
2cm × 2 = 4cm12cm : 2 = 6cm
2cm × 6 = 12 cm2cm × 5 + 4cm = 10cm + 4cm = 14cm
2dm × 7 = 14cm20kg : 2 = 10kg
2kg × 9 = 18kg2kg ×10 - 5kg = 20kg – 5kg = 15kg
2cm × 2 = 4cm12cm : 2 = 6cm
2cm × 6 = 12 cm2cm × 5 + 4cm = 10cm + 4cm = 14cm
2dm × 7 = 14cm20kg : 2 = 10kg
2kg × 9 = 18kg2kg ×10 - 5kg = 20kg – 5kg = 15kg