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Estratègies

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Flashcards on Estratègies, created by patriciarug on 15/12/2015.
patriciarug
Flashcards by patriciarug, updated more than 1 year ago
patriciarug
Created by patriciarug over 8 years ago
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Question Answer
SUMA D'1 3+1=4
PROPIETAT COMMUTATIVA Demostració amb materials 3+2=2+3
SUMES DE DOBLES 2+2=4
DOBLES MÉS/MENYS 1 (2+2)+1= 3+2 (3+3)-1=3+2
COMPENSACIÓ AL VOLTANT DE 10 9+2=(9+1)+(2-1) 9+2=(9+1)+1 9+2=10+1 9+2=11
INVERS DE LA SUMA 7-3=3+?=7
RECOMPTE PROGRESSIU I REGRESSIU Es dóna quan el substraent és 1 o 2 --> 13-2=11
SUMAR 0, SUMAR 10 Substituir el 0 del 10 pel nombre --> 10+9=19
SUMAR NOMBRES QUE ES DIFERENCIEN EN 2 UNITATS Es pot doblar el nombre del mig Ex: 7+9 -> el nombre del mig és 8, doncs 8+8=16
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