Question

a) 1356:3+[136x75-(324:4:9x3+45)+246-123:3]=
b) [84+60x100:(7x2+3x2)-14]:[(40-5x2)+(75-4x17)]=
c) 47502:[17+23x3-(34:2+123:3)+10x5+9]-123=

Answer 1

a)
1356:3+[136x75-(324:4:9x3+45)+246-123:3]=
=452 + [ 10 200 - ( 81:9x3+45) +246 - 41]
=452 + [10 200 - ( 9x3 + 45) +246 -41]=
=452 +[ 10 200 - (27 +45) + 246 - 41 ]=
=452 + ( 10 200 - 72 + 246 - 41)=
=452 + ( 10 128 + 246 - 41) =
= 452 + (10 374 - 41)=
= 452 + 10 333 = 
= 10 785

b)
[84+60x100:(7x2+3x2)-14]:[(40-5x2)+(75-4x17)]=10
= [ 84 + 6 000 : ( 14 + 6) - 14] : [ ( 40 - 10) + ( 75 - 68)]=
=(84 + 6000 : 20 - 14) : ( 30 + 7)=
=(84 + 300 - 14) : 37 =
 =(384 - 14) : 37 = 
= 370 : 37=
= 10

c)
 47502:[17+23x3-(34:2+123:3)+10x5+9]-123= 423
=47 502 : [ 17 + 69 - ( 17 + 41) + 50 +9] - 123 = 
=47 502 : (86 - 58 + 50 + 9 ) - 123 =
= 47 502 : ( 28 + 59) - 123=
= 47 502 : 87 -123=
= 546 - 123 = 
= 423