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Zahlenstraße (Alleovs) - Addition und Subtraktion - Zielgruppe 1. bzw. 2. Klasse - ab 6 Jahren
Addition and Subtraction | Jack Hartmann
@Numberblocks - Addition and Subtraction! | Learn to Count
Adding and Subtracting (song for kids about addition/subtracting)
Fact Family Triangles - Addition and Subtraction Cartoon | Math for 1st Grade | Kids Academy
Subtraction for kids - Learn how to subtract - Mathematics for kids -
Math for kids: addition, subtraction, multiplication, division | English for beginners
Addition and Subtraction with the Schickard Calculator from 1623