Respostas
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4
a)
13 = 12 + 1 = 6 1
------ ------ ---- -----
2 2 2 2
*********************************************
b)
20 = 18 + 2 = 6 2
----- ----- ----- ------
3 3 3 3
******************************************
c)
42 = 40 + 2 (:2) = 4 1
------ ------ ----- -----
10 10 10 (:2) 5
*****************************************************
d)
25 = 13 + 12 = 1 12
------ ------ ------ ------
13 13 13 13
13 = 12 + 1 = 6 1
------ ------ ---- -----
2 2 2 2
*********************************************
b)
20 = 18 + 2 = 6 2
----- ----- ----- ------
3 3 3 3
******************************************
c)
42 = 40 + 2 (:2) = 4 1
------ ------ ----- -----
10 10 10 (:2) 5
*****************************************************
d)
25 = 13 + 12 = 1 12
------ ------ ------ ------
13 13 13 13
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