Les additions et les soustractions sont liées:
partie + partie = tout (petit + petit = grand) alors : tout - partie = partie (grand - petit = petit) Entraîne-toi à calculer de tête les soustractions le plus vite possible avec ce jeu: clic! Choisis "toutes les soustractions" |
exemple:
7 + 5 = 12 exemple:
12 - 5 = 7 et 12 - 7 = 5 |
Additions and subtractions are linked:
part + part = whole
(small number + small number = big number)
So:
whole - part = part
(big number - small number = small number)
Practice counting soustractions very fast with this game: clic! Choose "toutes les soustractions"
part + part = whole
(small number + small number = big number)
So:
whole - part = part
(big number - small number = small number)
Practice counting soustractions very fast with this game: clic! Choose "toutes les soustractions"