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

Toán Lớp 6: 9) 5 + [ – (–12) + (–9)] – [7 – (–10) + 3] 10)[5 – (–4) + (–7)] – [– (–8) + (–9) +1] 11)13 – [5 – (4 – 5) + 6] – [3 – (2 – 7)] 12)(14 –

Tháng Chín 9, 2022 Toán học 2 Comments 0 views

Toán Lớp 6: 9) 5 + [ – (–12) + (–9)] – [7 – (–10) + 3]
10)[5 – (–4) + (–7)] – [– (–8) + (–9) +1]
11)13 – [5 – (4 – 5) + 6] – [3 – (2 – 7)]
12)(14 – 12 – 7) – [– (–3 + 2) + (5 – 9)

Comments ( 2 )

  1. khanhlanchau
    khanhlanchau
    9 Tháng Chín, 2022 at 10:46 sáng
    Reply
    9)5 + [-(-12)+ (-9)] – [7 -(-10) + 3]
    =5 + [12 -9] – ( 7 + 10 + 3)
    =5 +3 – 20
    =8 – 20
    =-12
    10) [5 -(-4) + (-7)] – [-(-8) + (-9) +1]
    =(5 + 4 – 7) – (8 – 9 +1)
    =2 – 0
    =2
    11)13 – [5 – (4-5) + 6] – [3 – (2-7)]
    =13 -(5 -4 + 5 + 6) – (3-2+7)
    =13 – 12 – 8
    =-7
    12) (14 – 12 – 7) – [-(-3+2) + (5-9)]
    =-5 – (3 -2 + 5 – 9)
    =-5 -(-3)
    =-5 +3
    =-2

  2. hienthucthu97
    hienthucthu97
    9 Tháng Chín, 2022 at 10:45 sáng
    Reply
    Giải đáp:
     
    Lời giải và giải thích chi tiết:
     9) 5 + [ – (–12) + (–9)] – [7 – (–10) + 3]
    $=5+12-9-7-10-3$
    $=(12-9-3)+(-7-10+5)$
    $=0-12$
    $=-12$
    $10)[5 – (–4) + (–7)] – [– (–8) + (–9) +1]$
    $=5+4-7-8+9-1$
    $=(5+4-7)+(-8-1+9)$
    $=2+0$
    $=2$
    $11)13 – [5 – (4 – 5) + 6] – [3 – (2 – 7)]$
    $=13-5+4-5-6-3+2-7$
    $=(13-3-7)+(-5-5)+(4-6+2)$
    $=3-10+0$
    $=-7$
    $12)(14 – 12 – 7) – [– (–3 + 2) + (5 – 9)$
    $=14-12-7-3+2+5-9$
    $=14+(-7-3)+(5-9)+(-12+2)$
    $=14-10-4-10$
    $=(14-10-4)-10$
    $=0-10$
    $=-10$
    (Bài tham khảo)

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

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