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[data-unit="rationale-zahlen"] .rational-numberline{background-image:none}
.math-practice-videos{margin-top:28px;padding:20px;border:1px solid #bfd0c7;background:white;border-radius:12px}.math-practice-videos video{display:block;width:100%;max-width:900px;height:auto;border-radius:8px}

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