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

Toán Lớp 6: a) 81 – 5[16 – 9(42 – 15)] b) 62 : (22.3) + 20210 c) 179 + 37 – 79 + 63 d) 74.11 + 43.26 + 74.32 giúp mình

Toán Lớp 6: a) 81 – 5[16 – 9(42 – 15)] b) 62 : (22.3) + 20210
c) 179 + 37 – 79 + 63 d) 74.11 + 43.26 + 74.32
giúp mình với mọi người

Comments ( 2 )

  1. a) 81 – 5[16 – 9(42 – 15)]
    =81-5[16-9.27]
    =81-5.-227
    =1216
    b) 62 : (22.3) + 20210
    =62:66+20210
    =20210,93939
    c) 179 + 37 – 79 + 63
    =(179-79)+(63+37)
    =100+100
    =200
    d) 74.11 + 43.26 + 74.32
    =74.(11+32)+43.26
    =74.43+43.26
    =43.(74+26)
    =43.100
    =4300
    color{blue}\text{sát thủ 2.0}
     

  2. Lời giải và giải thích chi tiết:
    $\text{a, 81 – 5.[16 – 9(42 – 15)]}$
    $\text{= 81 – 5.[16 – 9.27]}$
    $\text{= 81 – 5.[16 – 81]}$
    $\text{= 81 – 5.65}$
    $\text{= 81 – 325}$
    $\text{= 244}$
    $\text{b) 62 ÷ (22.3) + 20210}$
    $\text{= 62 ÷ 66 + 20210}$
    $\text{= $\dfrac{31}{32}$}$
    $\text{= 0,(93) + 20210}$
    $\text{= 20210,(93)}$
    $\text{c) 179 + 37 – 79 + 63}$
    $\text{= (179-79) + (37+63)}$ 
    $\text{= 100 + 100}$
    $\text{= 200}$
    $\text{d, 74.11 + 43.26 + 74.32}$
    $\text{= 74.(11 + 32) + 43.26}$
    $\text{= 74.43 + 43.26}$
    $\text{= 43.(74 + 26)}$
    $\text{= 43.100}$
    $\text{= 4300}$
     

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