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b 2
c. 1500
d. 30
e. 450
b. 200 ÷ 100 = 2 ons
c. 15 × 100 = 1500 dg
d. 20 kg + (100:10) kg = 20 kg + 10 kg = 30 kg
e. (3 × 100) + (15 × 10) = 300 g + 150 g = 450 g