X I. 1. {[ 2 - (3 x 5 - 13): 2 ] x 3-8:4} x [ 11 x 2-(3 x 5-5):5] x 11= 2. 42 + 18 x { 5+ 3 x [21 + 2 x ( 529 - 8 x 48 ) - 12 x 2 ]-9} - 41= 3. [1 + (5 x 7 - 2 x 15 )] : 2 x ( 2 x 8 - 15): [3: (1 + 14:7) +2 ]= 4. (32 : 4 + 5 x 6-9:3+3): [( 36: 2 + 6 x 12) – 8 x 10 - 8]= 5. 40 + 3x { 36:9- [3 x ( 400 : 8-98: 2)]}= 6. [84 + 60 x 100: (7 x 2 + 3 x 2) - 14] : [( 40 – 5 x 2 ) + ( 75 - 4 x 17 )]= 7. 100 - [ 36 + 54 - ( 18: 3 + 15 )]: 3= 8. 92 + 8 x [ 1004 - 4x (8: 2 x 2 - 4x 2:2)]= 9. 1:{1x [(1 +1 +1 +1):4+1 ] -1} - 1= 10.2 + { 222 : 2 x 2 + [ 92 + 2 x 4x ( 29 – 14 x 2:7) x 9 ] + 100)=
Răspunsuri la întrebare
X I.
1. {[ 2 - (3 x 5 - 13): 2 ] x 3-8:4} x [ 11 x 2-(3 x 5-5):5] x 11=
={[2-(15-13):2]x3-2}x[22-(15-5):5]x11=
=[(2-2:2)x3-2]x(22-10:5)x11=
=[(2-1)x3-2]x(22-2)x11=
=(1x3-2)x20x11=
=(3-2)x220=
=1x220=
=220
2. 42 + 18 x { 5+ 3 x [21 + 2 x ( 529 - 8 x 48 ) - 12 x 2 ]-9} - 41=
=42+18x{5+3x[21+2x(529-384)-24]-9}-41=
=42+18x[5+3x(21+2x145-24)-9]-41=
=42+18x[5+3x(21+290-24)-9]-41=
=42+18x[5+3x(311-24)-9]-41=
=42+18x(5+3x287-9)-41=
=42+18x(5+861-9)-41=
=42+18x(866-9)-41=
=18x857+42-41=
=15 426+1=
=15 427
3. [1 + (5 x 7 - 2 x 15 )] : 2 x ( 2 x 8 - 15): [3: (1 + 14:7) +2 ]=
=[1 + (35- 30 )] : 2 x (16- 15): [3: (1 + 2)+2 ]=
=(1+5):2x1:(3:3+2)=
=6:2x1:(1+2)=
=3x1:3=
=3:3=
=1
4. (32 : 4 + 5 x 6-9:3+3): [( 36: 2 + 6 x 12) – 8 x 10 - 8]=
=(8+ 30-3+3): [( 18 + 72) – 80- 8]=
=38:(90-80-8)=
=38:(10-8)=
=38:2=
=19
5. 40 + 3x { 36:9- [3 x ( 400 : 8-98: 2)]}=
=40 + 3x { 4- [3 x ( 50-49)]}=
=40+3x[4-(3x1)]=
=40+3x(4-3)=
=40+3x1=
=40+3=
=43
6. [84 + 60 x 100: (7 x 2 + 3 x 2) - 14] : [( 40 – 5 x 2 ) + ( 75 - 4 x 17 )]=
=[84 + 6000: (14 + 6) - 14] : [( 40 – 10) + ( 75 - 68 )]=
=(84+6000:20-14):(30+7)=
=(84+300-14):37=
=(384-14):37=
=370:37=
=10
7. 100 - [ 36 + 54 - ( 18: 3 + 15 )]: 3=
=100 - [ 36 + 54 - ( 6+ 15 )]: 3=
=100 - ( 36 + 54 - 21): 3=
=100 - ( 90- 21): 3=
=100-69:3=
=100-23=
=77
8. 92 + 8 x [ 1004 - 4x (8: 2 x 2 - 4x 2:2)]=
=92 + 8 x [ 1004 - 4x (4x 2 - 8:2)]=
=92 + 8 x [ 1004 - 4x (8- 4)]=
=92+8x(1004-4x4)=
=92+8x(1004-16)
=92+8x988=
=92+7904=
=7996
9. 1:{1x [(1 +1 +1 +1):4+1 ] -1} - 1=
=1:[1x (4:4+1 ) -1]- 1=
=1:[1x (1+1 ) -1]- 1=
=1:(1x2-1)- 1=
=1:(2-1)- 1=
=1:1-1=
=1-1=
=0
10. 2 + { 222 : 2 x 2 + [ 92 + 2 x 4x ( 29 – 14 x 2:7) x 9 ] + 100}=
=2 + { 111x 2 + [ 92 + 8x ( 29 – 28:7) x 9 ] + 100}=
=2 + { 222 + [ 92 + 8x ( 29 – 4) x 9 ] + 100}=
=2+[222+(92+8x25x9)+100]=
=2+[222+(92+200x9)+100]=
=2+[222+(92+1800)+100]=
=2+(222+1892+100)=
=2+2114+100=
=2216