Suma primeiro

Addition. Tree algorithm

arbore_manipulativa.PNG

CAUTION: Begin grouping on the left, that is, by higher values

arbore_simbolica.PNG

explicación_0.PNG

WORKSHEET

WORKSHEET (numbers with 3 digits)

 

Sum of the numbers of a set

Check with rods if the addition is correct

exercicio.PNG

modelo.PNG

comproba.PNG

FICHA DE TRABALLO

The Paco's sack

This exercise consists of grouping the numbers into sets of 10 units and then adding them.

modelo.PNG

WORKSHEET

What rod you need in order to complete the number 10?

In this exercise you must indicate which rod is necesary to complete 10. Remember the friends numbers.

 

completa_10.PNG

 

FICHA DE TRABALLO

Numbers friendsamigos

 

Two numbers are friends if between numbers sum 10

5 and 5

(The number five is a friend itself)

5e5

6 and 4

(We can draw a number four if you rotate 90° the number six)

6e4conversion dun 6 nun catro

7 and 3

(the number 7 is drawed with 3 lines)

7 e 37 e 3 dous

8 and 2

(the number 8 has two holes)

8e28e2 mnemotécnico

9 and1

(the number nine has one hole)

9e19 e 1 mnemo