Số? a) 20 mm² + 30 mm² = ..?.. mm² 36 cm² – 17 cm² = ..?.. cm² b) 6 m² × 4 = ..?.. m² 30 dm² : 5 = ..?.. dm²

Số?

a) 20 mm² + 30 mm² = ..?.. mm² 36 cm² – 17 cm² = ..?.. cm²

b) 6 m² × 4 = ..?.. m² 30 dm² : 5 = ..?.. dm²

Số? a) 20 mm2 + 30 mm2 = ..?.. mm2 36 cm2 – 17 cm2 = ..?.. cm2 b) 6 m2 × 4 = ..?.. m2 30 dm2 : 5 = ..?.. dm2