0:00:00.050,0:00:01.850
La inceputul saptamanii

0:00:01.850,0:00:03.783
contul curent al lui Stewart avea un sold

0:00:03.783,0:00:07.200
negativ de 15 dolari si 8 centi.

0:00:07.200,0:00:09.800
Luni dimineata a depus un cec

0:00:09.800,0:00:12.733
de 426 dolari si 90 de centi.

0:00:12.733,0:00:15.488
Marti dimineata a depus un alt cec

0:00:15.488,0:00:17.160
de o suta de dolari.

0:00:17.160,0:00:19.692
Ce suma se afla in contul curent al lui Stewart

0:00:19.692,0:00:24.861
dupa cel de-al doilea depozit, deci dupa amandoua depozitele de aici?

0:00:24.861,0:00:27.237
Deci incepe cu un sold negativ,

0:00:27.237,0:00:28.200
un sold negativ inseamna

0:00:28.200,0:00:31.131
ca a cheltuit mai mult decat avea disponibil in cont.

0:00:31.131,0:00:32.017
De fapt, este dator bancii acum.

0:00:32.017,0:00:34.918
Din fericire, acum o sa puna bani in contul sau,

0:00:34.918,0:00:38.615
drept urmare va avea un sold pozitiv in contul curent.

0:00:38.615,0:00:43.467
El incepe cu o datorie de 15 dolari si 8 centi,

0:00:43.467,0:00:45.302
iar la aceasta adauga

0:00:45.302,0:00:49.889
426 dolari si 90 de centi.

0:00:49.889,0:00:51.867
Apoi adauga inca o suta de dolari.

0:00:52.317,0:00:59.791
Deci, a inceput cu un minus de 15 dolari si opt centi,

0:00:59.791,0:01:03.507
la care adauga 426 dolari

0:01:03.507,0:01:04.867
si 90 de centi si 100 de dolari.

0:01:04.867,0:01:09.358
Asta inseamna 526 si 90 de centi.

0:01:09.358,0:01:11.473
Drept urmare, ce suma va avea in contul sau?

0:01:11.473,0:01:14.838
A inceput cu o datorie de 15 dolari si opt centi,

0:01:14.838,0:01:15.674
iar la aceasta adauga

0:01:15.674,0:01:18.832
526 dolari si 90 de centi.

0:01:18.832,0:01:20.086
Un mod de a privi problema

0:01:20.086,0:01:23.000
este sa ne gandim la ea pe o axa a numerelor,

0:01:23.250,0:01:25.798
cu zero aici.

0:01:25.798,0:01:31.000
El incepe la punctul -15.08,

0:01:31.000,0:01:32.160
la care va adauga

0:01:32.160,0:01:37.222
526 dolari [si 90 de centi].

0:01:37.222,0:01:40.733
La stanga avem 15.08,

0:01:40.733,0:01:41.817
suma pe care o datoreaza,

0:01:41.817,0:01:43.631
iar la aceasta va adauga

0:01:43.631,0:01:46.333
526 [dolari si 90 de centi].

0:01:46.333,0:01:47.950
Nu desenez acest lucru la scala,

0:01:47.950,0:01:49.203
dar la suma aceasta va adauga

0:01:49.203,0:01:54.358
526 dolari si 90 de centi.

0:01:54.358,0:01:55.962
Deci, soldul pozitiv pe care il va avea

0:01:55.962,0:01:57.284
va fi

0:01:57.284,0:01:59.420
526 dolari si 90 de centi

0:01:59.420,0:02:02.021
minus 15.08.

0:02:02.021,0:02:03.275
Drept urmare va fi distanta aceasta,

0:02:03.275,0:02:09.726
aceasta suma va fi pozitiva.

0:02:09.726,0:02:13.733
Va fi 526,90

0:02:13.733,0:02:16.510
minus 15,08

0:02:16.510,0:02:17.467
Deci va fi -

0:02:17.467,0:02:20.225
si putem sa rescriem aceasta

0:02:20.225,0:02:21.851
ca sa arate asa.

0:02:21.851,0:02:24.219
Este exact acelasi lucru precum

0:02:24.219,0:02:26.495
526,90

0:02:26.495,0:02:27.076
minus -

0:02:27.076,0:02:27.656
minus -

0:02:27.656,0:02:31.928
sa adaugi un numar negativ este acelasi lucru

0:02:31.928,0:02:32.883
cu a scadea un numar pozitiv -

0:02:32.883,0:02:35.267
minus 15,08

0:02:35.267,0:02:37.200
- O sa scriu asta cu alta culoare -

0:02:37.200,0:02:40.200
526,90

0:02:40.200,0:02:43.956
minu 15,08.

0:02:43.956,0:02:46.557
Sa vedem, zero este mai mic decat opt,

0:02:46.557,0:02:48.972
facem din acesta un zece si imprumutam de la noua

0:02:48.972,0:02:50.551
asa incat acesta devine 8 -

0:02:50.551,0:02:51.619
sau as putea spune ca regrupam -

0:02:51.619,0:02:54.173
Totul de aici este mai mare decat totul de acolo,

0:02:54.173,0:02:56.356
deci zece minus opt e doi,

0:02:56.356,0:02:58.445
opt minus zero e opt,

0:02:58.445,0:02:59.421
si avem zecimalele.

0:02:59.421,0:03:01.603
Sase minus cinci e unu,

0:03:01.603,0:03:04.111
Doi minus unu e unu,

0:03:04.111,0:03:06.067
si apoi ai cinci minus nimic.

0:03:06.067,0:03:07.640
Deci a ramas

0:03:07.640,0:03:10.733
cu 511 dolari si 82 de centi,

0:03:10.733,9:59:59.000
dupa cel de-al doilea depozit.