← ArithmeticArithmetic 019 (generated) — Halve and doubleArithmeticPracticeMediumYour answerEnter only the number. Use a point or comma for decimals.Check answerReveal solutionStuck? Show me one stepRelated exercisesSimilarArithmetic 011 (generated) — Common factorArithmetic 025 (generated) — Make a hundredArithmetic 049 (generated) — Fractions of lengths and clever calculating