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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: Bài 1: Tính a, (-12) + (-23) + 42 b, 99 + (-5) + (-104) + 11 c, (-4) + 78 + (-16) + (-21) d, 22 + (-7) + (-19) + (-14) Bài 2: Tính

Tháng Tám 28, 2022 Toán học 2 Comments 0 views

Toán Lớp 6: Bài 1: Tính

a, (-12) + (-23) + 42
b, 99 + (-5) + (-104) + 11
c, (-4) + 78 + (-16) + (-21)
d, 22 + (-7) + (-19) + (-14)

Bài 2: Tính

a, 8 – 34 – 19 – 7
b, -52 – 34 – (-5)
c, -156 – (-31) – 92
d, 46 – 261 – (-23) – 77

Bài 3: Tính

a, – 29 – 11 – 82 – 6
b, 48 – 23 – (-20) – 11
c, 102 – (-33) – (-7) – 4
d, -71 – (-4) – 22 – 10

Bài 4: Tính

a, -(-29 – 7) + (-44 + 19)
b, (34 – 54 – 9) – 45 – (-3)
c, -(-27 – 77 – 2) + 78
d, 25 + (-81 – 6 – 20)

Bài 5: Tính

a, (-3) + (8 – 22) – (-110)
b, 281 + (-333) – (23 – 17 – 10)
c, -(-35 – 6 – 90 + 12)
d, 4 + (-29 – 14 + 32)

Bài 6: Tìm x biết:
a, -x + 8 = -17 b, 35 – x = 37
c, -19 – x = -20 d, x – 45 = -17
Bài 7: Tính

a, (-71 + 22) – (-29 – 81) + 99
b, (27 – 8 – 11) – (-267)
c, -(-291 – 14 + 31) + (-12)
d, 72 – (-19 – 25) – (-9)

Bài 8: Tính

a, -92 – (-192 + 45 + 9)
b, 23 + (-32 – 18 – 22) – (-6)
c, – (-81 – 23 + 27) – (-41 – 100)
d, -(-87 + 12 + 320) – (-28 – 1 + 9)

Comments ( 2 )

  1. hoaiphuong85
    hoaiphuong85
    28 Tháng Tám, 2022 at 5:30 sáng
    Reply
    Giải đáp:
     $\text{Bài 1:}$
    $a) (-12)+(-23)+42$
    $= [(-12)+(-23)]+42$
    $= (-35)+42$
    $= 42-35$
    $= 7$
    $b) 99+(-5)+(-104)+11$
    $= (99+11)+[(-5)+(-104)]$
    $= 110+(-109)$
    $= 110-109$
    $= 1$
    $c) (-4)+78+(-16)+(-21)$
    $= [(-4)+(-16)]+[78+(-21)]$
    $= (-20)+57$
    $= 57-20$
    $= 37$
    $d) 22+(-7)+(-19)+(-14)$
    $= [22+(-7)+(-14)]+(-19)$
    $= 1+(-19)$
    $= -18$
    $\text{Bài 2:}$
    $a) 8-34-19-7$
    $= (-26)+(-26)$
    $=-52$
    $b) (-52)-34-(-5)$
    $= (-52)-34+5$
    $= [(-52)-34]+5$
    $= (-86)+5$
    $= -81$
    $c) (-156)-(-31)-92$
    $= (-156)+31-92$
    $= (-156)+(-61)$
    $= -217$
    $d) 46-261-(-23)-77$
    $= 46-261+23-77$
    $= (-215)+(-54)$
    $= -269$
    $\text{Bài 3:}$
    $a) (-29)-11-82-6$
    $= [(-29)-11]+[(-82)-6]$
    $= (-40)+(-88)$
    $= -128$
    $b) 48-23-(-20)-11$
    $= 48-23+20-11$
    $= 25+9$
    $= 34$
    $c) 102-(-33)-(-7)-4$
    $= 102+33+7-4$
    $= (102-4)+(33+7)$
    $= 98+40$
    $= 138$
    $d) (-71)-(-4)-22-10$
    $= (-71)+4-22-10$
    $= [(-71)+4]+[(-22)-10]$
    $= (-67)+(-32)$
    $= -99$
    $\text{Bài 4:}$
    $a) -(-29-7)+(-44+19)$
    $= 29+7+(-44)+19$
    $= [ 29+(-44)]+(7+19)$
    $= (-15)+26$
    $= 11$
    $b) (34-54-9)-45-(-3)$
    $= 34-54-9-45+3$
    $= (34-54-9)+[(-45)+3]$
    $= (-29)+(-42)$
    $= -71$
    $c) -(-27-77-2)+78$
    $= 27+77+2+78$
    $= 104+80$
    $= 184$
    $d) 35+(-81-6-20)$
    $= 35+(-81)-6-20$
    $= [35+(-81)]+[(-6)-20]$
    $= (-46)+(-26)$
    $= -72$
    $\text{Bài 5:}$
    $a) (-3)+(8-22)-(-110)$
    $= (-3)+8-22+110$
    $= 5+[(-22)+110]$
    $= 5+88$
    $= 93$
    $b) 281+(-333)-(23-17-10)$
    $= 281+(-333)-23+17+10$
    $= (281+17+10)+[(-333)-23]$
    $= 308+(-356)$
    $= -48$
    $c) -(-35-6-90+12)$
    $= 35+9+90-12$
    $= 44+78$
    $= 122$
    $d) 4+(-29-14+32)$
    $= 4+(-29)-13+32$
    $= [4+(-29)+32]-13$
    $= 7-13$
    $= -6$
    $\text{Bài 6:}$
    $a)-x+8=-17$
    $⇔ -x= (-17)-8$
    $⇔ -x=-25$
    $⇔ x=25$
    $\text{Vậy x=25}$
    $b) 35-x=37$
    $⇔ x= 35-37$
    $⇔ x= -2$
    $\text{Vậy x=-2}$
    $c) -19-x=-20$
    $⇔ x= (-19)-(-20)$
    $⇔ x= (-19)+20$
    $⇔ x= 1$
    $\text{Vậy x=1}$
    $d) x-45=-17$
    $⇔ x= (-17)+45$
    $⇔ x= 45-17$
    $⇔ x= 28$
    $\text{Vậy x=28}$
    $\text{Bài 7:}$
    $a) (-71+22)-(-29-81)+99$
    $= (-71)+22+29+81+99$
    $= [(-71)+22+29]+(81+99)$
    $= (-20)+180$
    $= 160$
    $b) (27-8-11)-(-267)$
    $= 27-8-11+267$
    $= (27-8-11)+267$
    $= 8+267$
    $= 275$
    $c) -(-291-14+31)+(-12)$
    $= 291+14-31+(-12)$
    $= [291+(-12)]+(14-31)$
    $= 279+(-17)$
    $= 262$
    $d) 72-(-19-25)-(-9)$
    $= 72+19+25+9$
    $= (72+19+9)+25$
    $= 100+25$
    $=125$
    $\text{ Bài 8:}$
     $a) (-92)-(-192+45+9)$
    $= (-92)+192-45-9$
    $= [192+(-92)]+[(-45)-9]$
    $= 100+(-54)$
    $= 46$
    $b) 23+(-32-18-22)-(-6)$
    $= 23+(-32)-18-22+6$
    $= [23+(-32)-18]+[(-22)+6]$
    $= (-27)+(-16)$
    $= -43$
    $c) -(-81-23+27)-(-41-100)$
    $= 81+23-27+41+100$
    $= 118+100$
    $= 218$
    $d) -(-87+12+320)-(-28-1+9)$
    $= 87-12-320+28+1-9$
    $=(-245)+20$
    $= -225$
    $\text{#2022}$

  2. lyly98
    lyly98
    28 Tháng Tám, 2022 at 5:29 sáng
    Reply
    Giải đáp:
     
    Lời giải và giải thích chi tiết:
    bài 1  tính 
    a,(-120+(-23)+42
    =[(-12)+(-23)]+42
    =(-35)+42
    =7
    b,99+(-5)+(-104)+11
    =99+[(-5)+(-104)+11]
    =99+(-98)
    =1
    c,(-4)+78+(-16)+(-21)
    =[(-4)+(-16)+[78+(-21)]
    =-20+57
    =37
    bài 2 tính
    a , 8-34-19-7
    =(-26)+12
    =-38
    b,-52-34-(-5)
    =52-34+(-5)
    =18+(-5)
    =18+5
    =23
    c,-156-(-31)-92
    =-156+31-92
    =-120-92
    =-212
    d,46-261-(-23)-77
    =46-261+23-77
    =-215+(-54)
    =-215-54
    =-269
    Bài 3:
    a,-29-11-82-6
    =-40-76
    =-116
    b,48-23-(-20)-11
    =48-23+20-11
    =25+9
    =34
    c,102-(-23)-(-7)-4
    =102+23+7-4
    =125+3
    =128
    d,-71-(-4)-22-10
    =-71+4-22-10
    =75-12
    =63

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222-9+11+12:2*14+14 = ? ( )

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