Matematică, întrebare adresată de dilbeacatalinam, 9 ani în urmă

Calculati (desfasurat)
a) 45+7x[307-816: (9-5)] - 8x1 =
b) 406-4x[3x(30-18:6:3)]=
c)832:8+[40+8x(100:5-72:4)]x10=
d) 25+6x[107-100:(8-3)]-9x1=
e) 1+3x[7+8x7-3+3x(5+6)]=
f) [55x5-[199-99x2+20x5)+220:10]:4=
g)5+[7+3x(7-2)]:3-6=
h) 9+8x[7+6x(5+4x3)-2x1]-10:10=

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Răspunsuri la întrebare

Răspuns de finamihai
25
a) 45+7x[307-816: (9-5)] - 8x1 =
45+7x[307-816: 4] - 8 =
45+7x[307-204] - 8 =
45+7x103 - 8 =
45+721 - 8 =
766-8=758

b) 406-4x[3x(30-18:6:3)]=
406-4x[3x(30-3:3)]=
406-4x[3x(30-1)]=
406-4x[3x29]=
406-4x87=
406-348=58

c)832:8+[40+8x(100:5-72:4)]x10=
104+[40+8x(20-18)]x10=
104+[40+8x2]x10=
104+[40+16]x10=
104+56x10=
104+560=664

d) 25+6x[107-100:(8-3)]-9x1=
25+6x[107-100:5)]-9=
25+6x[107-20)]-9=
25+6x87-9=
25+522-9=
547-9=538

e) 1+3x[7+8x7-3+3x(5+6)]=
1+3x[7+56-3+3x11]=
1+3x[7+53+33]=
1+3x93=
1+279=280

f) [55x5-[199-99x2+20x5)+220:10]:4=
[55x5-[199-99x2+20x5)+22]:4=
[275-(199-198+100)+22]:4=
(275-101+22):4=
196:4=49

g)5+[7+3x(7-2)]:3-6=
cred ca era
{5+[7+3x5]}:3-6=
{5+[7+15]}:3-6=
{5+22}:3-6=
27:3-6=
9-6=3

h) 9+8x[7+6x(5+4x3)-2x1]-10:10=
 9+8x[7+6x(5+12)-2]-1=
 9+8x[7+6x17-2]-1=
 9+8x[7+102-2]-1=
9+8x107-1=
9+856-1=
865-1=864

finamihai: mersi
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