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
a) 20 mm2 + 30 mm2 = 50 mm2 36 cm2 – 17 cm2 = 19 cm2
b) 6 m2 × 4 = 24 m2 30 dm2 : 5 = 6 dm2