関連ワード:  case based questions class 6 maths perimeter and area    case based questions class 6 maths    case based questions class 6 maths fractions    case based questions class 6 maths decimals    case based questions class 6 maths data handling    case based questions class 6 maths integers    case based questions class 6 maths mensuration    case based questions class 6 maths lines and angles    case based questions class 6 maths playing with numbers    case based questions class 6 maths algebra