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

Toán Lớp 6: Thực hiện phép tính 1. 12 + 15 2. (– 16) + ( – 9) 3. (– 47) + (– 23) 4. (– 59) + 23 5. 169 + ( – 169) 6. 3110 + (– 3012) 7. 21 – 36 8.

Toán Lớp 6: Thực hiện phép tính
1. 12 + 15
2. (– 16) + ( – 9)
3. (– 47) + (– 23)
4. (– 59) + 23
5. 169 + ( – 169)
6. 3110 + (– 3012)
7. 21 – 36
8. (– 29) – 36
9. (– 45) + (100 + 45)
10. – (39 + 55) + 39

Comments ( 2 )

  1. 1. 12+15=27
    2. (-16)+(-9)=(-25)
    3. (-47)+(-23)=(-70)
    4. (-59)+23=(-36)
    5. 169 + (-169)=0
    6. 3110+(-3012)=98
    7. 21-36=-15
    8. (-29)-36=-65
    9. (-45)+(100+45)
    =(-45)+100+45
    =100
    10. -(39+55)+39
    =-39-55+39
    =-55

  2. Giải đáp:
    1. 12 + 15 = 27
    2. (– 16) + ( – 9) = -25
    3. (– 47) + (– 23) = -70
    4. (– 59) + 23 = -36
    5. 169 + ( – 169) = 0
    6. 3110 + (– 3012) = 98
    7. 21 – 36 = -15
    8. (– 29) – 36 = -65
    9. (– 45) + (100 + 45)
    = (– 45) + 100 + 45
    = 100
    10. – (39 + 55) + 39
    = – 39 – 55 + 39
    = -55

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

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