Exercícios de Expressões numéricas 7º ano 6ª serie:

1) Calcule o valor das expressões

a) 25-[10+(7-4)] =                              (R:12)
b) 32+[10-(9-4)+8] =                         (R:45)
c) 45-[12-4+(2+1)] =                          (R:34)
d) 70-{20-[10-(5-1)]} =                     (R:56)
e) 28+{13-[6-(4+1)+2]-1} =              (R:37)
f) 53-{20-[30-(15-1+6)+2]} =           (R:45)
g) 62-{16-[7-(6-4)+1]} =                   (R:52)
h) 20-{8+[3+(8-5)-1]+6} =                (R:1)
i) 15+{25-[2-(8-6)]+2} =                   (R:42)
j) 56-[3+(8-2)+(51-10)-(7-2)] =          (R:11)

EXERCÍCIOS

1) Calcule as expressões

a) 3x75+3x25                          = (R:300)
b) 5x97+5x3                          = (R:500 )
c) 4x101+4x99                       = (R:800)
d) 20x47+80x47                    = (R:4700)
e) 12+16:8x3-5                       = (R:13)
f) 100-6x7+8:2                       = (R:62)
g) 64:8+5x5-3                        = (R: 30)
h) 1+3+5x7-9:3                      = (R:36)

2) Calcule o valor das expressões:

a) 7+15:3                    = (R:12)
b) 4x5+1                     = (R:21)
c) 10:2+8                    = (R:13)
d) 32+12:2                  = (R:38)
e) 20:10+10                = (R:12)
f)7x3-2x5                   = (R:11)
g)40-2x4+5                 = (R:37)
h)4x3+10:2                 = (R:17)
i)50-16:8+7                 = (R:55)
j)32:4:2:2                    = (R:2)

3) Calcule o valor das expressões

a) (13+2)x3+5            = (R:50)
b)(7+2)x(3-1)              = (R:18)
c)(4+2x5)-3                = (R:11)
d) 20-(15+6:3)                        = (R:3)
e)15+[6+(8-4:2)]                    = (R:27)
f)40-[3+(10-2):2]                    = (R:33)
g)[30+2x(5-3)]x2-10              = (R:58)
h) 10+[4+(7x3+1)]-3              = (R:33)

4) Calcule o valor das expressões

a) (3+2)x(5-1)+4                    = (R:24)
b) 82-8x7:(4-1x3)                   = (R:26)
c) 25-[10-(2x3+1)]                 = (R:22)
d) 70-[12+(5x2-1)+6]             = (R:43)
e)8:2+[15-(4x2+1)]                = (R:10)
f)9+[4+2x(6-4)+(2+5)]-8                   = (R:16)
g) 50+{10-2x[(6+4:2)-(10-3)]}                      = (R:58)
h)180:{10+2x[20-45:(13-2x5)]}                    = (R:9)


5) Calcule o valor das expressões:

a) 70:7-1                     = (R:9)
b) 20+3x                     2= (R:26)
c) 30+10:10                = (R:31)
d) 150-7x12                = (R:66)
e) 48:16+20:4             = (R:8)
f) 10-8:2+3                 = (R:9)
g) 30:5-1+2x3             = (R:11)


6) Calcule as expressões:

a) (3+4)x(9-8)                         = (R:7)
b) (20+8):(3+4)                      = (R:4)
c) 15+8x(2+3)                        = (R:55)
d) (5+3x2)-1                           = (R:10)
e) 25+(8:2+1)-1                      = (R:29)
f) 15+[5x(8-6:2)]                    = (R:40)
g) 50-[13-(10-2):2]                 = (R:41)
h) [40+2x(7-5)]x2-20             = (R:68)

7) Calcule o valor das expressões:

a) 16+[10-(18:3+2)+5]                       = (R: 23)
b) 25-[12-(3x2+1)]                             = (R: 20)
c) 90-[25+(5x2-1)+3]                         = ( R: 53)
d) 45+[(8x5-10:2)+(18:6-2)]              = (R: 81)
e) 50-2x{7+8:2-[9-3x(5-4)]}              = (R: 40)
f) 100-3x{5+8:2-[3x(7-6)]}               = (R: 82)

8) Determine o valor de cada expressão

a) 1000 - [(2 . 4 - 6) + ( 2 + 6 . 4)]                                         = (R: 972)
b) 60 + 2 . {[ 4 . ( 6 + 2 ) - 10 ] + 12}                                               = ( R: 128 )
c) [( 4 + 16 . 2) . 5 - 10] . 100                                                = (R: 17.000)
d) { 10 + [ 5 . ( 4 + 2 . 5) - 8] . 2 } – 100                              = ( R: 34)
e) 80 - 5 . ( 28 - 6 . 4 ) + 6 - 3 . 4                                           = (R: 54)

9) Calcule

a) 4 . ( 10 + 20 + 15 + 30)                                                     = (R: 300)
b) (10 . 6 + 12 . 4 + 5 . 8 ) – 40                                              = (R: 108)
c) [ 6 . ( 3 . 4 - 2 . 5) - 4 ] + 3 . ( 4 - 2) - ( 10 : 2 )                  = (R: 9)
d) 67 + { 50 . [ 70 : ( 27 + 8 ) + 18 : 2 ] + 21 }                     = (R:638)
e) [ 30 . ( 9 - 6)] + { 30 : ( 9 + 6 ) ]                                        = (R: 92)
f) 58 - [ 20 - ( 3 . 4 - 2) : 5 ]                                                   = (R: 40)
g) 40 + 2 . [ 20 - ( 6 + 4 . 7 ) : 2 ]                                          = ( R: 46)