1. SR=4m. 2. 15 cm 2 mm
1. 7-3=4
2. 38×4=152 = 15 cm 2 mm
или
38+38+38+38=152 = 15 cm 2 mm
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1. SR=4m. 2. 15 cm 2 mm
1. 7-3=4
2. 38×4=152 = 15 cm 2 mm
или
38+38+38+38=152 = 15 cm 2 mm