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

Toán Lớp 6: thực hiện phép tính a.5.2^2-18:3 b.17.85+15.17-2^3.3.5 c.2^3.17-2^3.14 d.20-[30-(5-1)^2] e.75-(3.5^2-4.2^3) f.2.5^2+3:71^0-54:3^3 g.150

Tháng Bảy 9, 2022 Toán học 2 Comments 0 views

Toán Lớp 6: thực hiện phép tính
a.5.2^2-18:3
b.17.85+15.17-2^3.3.5
c.2^3.17-2^3.14
d.20-[30-(5-1)^2]
e.75-(3.5^2-4.2^3)
f.2.5^2+3:71^0-54:3^3
g.150+50:5-2.3^2
h.5.3^2-32:4^2

Comments ( 2 )

  1. dananhthumai
    dananhthumai
    9 Tháng Bảy, 2022 at 10:41 sáng
    Reply
    $\text{a)}$
    $\text{5 .$2^{2}$ – 18 : 3 }$
    $\text{= 5 . 4 – 18 : 3}$
    $\text{= 20 – 6}$
    $\text{= 14}$
    $\text{b)}$
    $\text{17 . 85 + 15 . 17 – $2^{3}$ . 3 .5 }$
    $\text{= 17 .(85 + 15) – 8 . 3 . 5}$
    $\text{= 17 . 100 – 120}$
    $\text{= 1700 – 120}$
    $\text{= 1580}$
    $\text{c)}$
    $2^{3}$ . $\text{17 – $2^{3}$ . 14 }$
    $\text{= 8 . 17 – 8 . 14}$
    $\text{= 8 . (17 – 14)}$
    $\text{= 8 . 3}$
    $\text{= 24}$
    $\text{d)}$
    $\text{20 – $\left[\begin{matrix} 30 -(5 – \end{matrix}\right.$}$$1^{2}$)]
    $\text{= 20 – (30 – $4^{2}$)}$
    $\text{= 20 – (30 – 16)}$
    $\text{= 20 – 14}$
    $\text{= 6}$
    $\text{e)}$
    $\text{75 – (3 . $5^{2}$ – 4 . $2^{3}$) }$
    $\text{= 75 – (3 . 25 – 4 .8)}$
    $\text{= 75 – (75 – 32)}$
    $\text{= 75 – 75 + 32}$
    $\text{= 0 + 32}$
    $\text{= 32}$
    $\text{f)}$
    $\text{2 . $5^{2}$ + 3 : $71^{0}$ – 53 : $3^{3}$ }$
    $\text{= 2 . 25 + 3 : 1 – 54 : 27}$
    $\text{= 50 + 3 – 27}$
    $\text{= 53 – 27}$
    $\text{= 26}$
    $\text{g)}$
    $\text{150 + 50 : 5 – 2 . $3^{2}$ }$
    $\text{= 150 + 10 – 2 . 9}$
    $\text{= 150 + 10 – 18}$
    $\text{= 160 – 18}$
    $\text{= 142}$
    $\text{h)}$
    $\text{5 . $3^{2}$ – 32 : }$$4^{2}$
    $\text{= 5 . 9 – 32 : 16}$
    $\text{= 45 – 2}$
    $\text{= 43}$

  2. minhtamnguyet88
    minhtamnguyet88
    9 Tháng Bảy, 2022 at 10:41 sáng
    Reply
    a, 5 · 2^2 – 18 : 3
        = 5 · 4 – 18 : 3
        = 20 – 6 = 14
    b, 17 · 85 + 15 · 17 – 2^3 · 3 · 5
        = 17 · (85 + 15) – 8 · 3 · 5
        = 17 · 100 – 120
        = 1700 -120 = 1580
    c, 2^3 · 17 – 2^3 · 14
       = 8 · 17 – 8 · 14
       = 8 · (17 – 14)
       = 8 · 3 = 24
    d, 20 – [30 – (5 – 1)^2]
        = 20 – (30 – 4^2)
        = 20 – (30 – 16)
        = 20 – 14 = 6
    e, 75 – (3 · 5^2 – 4 · 2^3)
        = 75 – (3 · 25 – 4 · 8)
        = 75 – (75 – 32)
        = 75 – 75 + 32
        = 0 + 32 = 32
    f, 2 · 5^2 + 3 : 71^0 – 54 : 3^3
       = 2 · 25 + 3 : 1 – 54 : 27
       = 50 + 3 – 27
       = 53 – 27 = 26
    g, 150 + 50 : 5 – 2 · 3^2
        = 150 + 10 – 2 · 9
        = 150 + 10 – 18
        = 160 – 18 = 142
    h, 5 · 3^2 – 32 : 4^2
        = 5 · 9 – 32 : 16
        = 45 – 2 = 43
    CHÚC BẠN HỌC TỐT

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

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