Tìm x : 32 x ( x : 68 ) = 3200 + 40
Tính nhanh 32 x (x : 68 ) =3200 + 40
32 x (\(x\) : 68) = 3200 + 40
32 x (\(x\) : 68) = 3240
\(x\) : 68 = 3240 : 32
\(x\) : 68 = \(\dfrac{405}{4}\)
\(x\) = \(\dfrac{405}{4}\) x 68
\(x\) = 6885
tinh nhanh
(81,6x27,3-17,3x8,16) x ( 32 x11 -3200 x 0,1 -32)
Ta có:
( 81,6 x 27,3 - 17,3 x 8,16 ) x ( 32 x 11 - 3200 x 0,1 - 32 )
= A x ( 32 x 11 - 320 - 32 )
= A. x ( 32 x 11 - 32 x 10 - 32 )
= A. x ( 32 x ( 11 - 10 - 1 ))
= A. x ( 32 x 0 )
= A. x 0
= 0
Tìm x, biết:
a) x – 8 + 32 = 68
b) x + 8 + 32 = 68
c) 98 - x + 34 = 43
d) 98 + x – 34 = 43
a)
x – 8 + 32 = 68
x – 8 = 68 – 32
x – 8 = 36
x = 36 + 8
x = 44
b)
x + 8 + 32 = 68
x + 8 = 68 – 32
x + 8 = 36
x = 36 – 8
x = 28
c)
98 – x + 34 = 43
98 – x = 43 – 34
98 – x = 9
x = 98 – 9
x = 89
d)
98 + x – 34 = 43
98 + x = 43 + 34
98 + x = 77
x = 98 – 77
x = 21
tick cho mink nhé!
(81,6 x 27,3 - 17,3 x 81,6) x (32 x 11 - 3200 x 0,1 - 32)
[ 81,6 x (27,3-17,3) ] x [ (32 x(11-10-1)=816 x 0=0
( 81.6 x 27.3 - 17.3 x 81.6 ) x ( 32 x 11 - 3200 x 0.1 - 32 )
= 81.6 x ( 27.3 - 17.3 ) x ( 32 x 11 - 32 x 10 - 32 )
= 81.6 x 10 x 32 x ( 11 - 10 - 1 )
= 81 . 6 x 10 x 32 x 0
= 0
(81,6 x 27,3 - 17,3 x 81,6)x(32 x 11 - 3200 x 0,1 -32)
=[81,6 x (27,3-17,3)] x (32 x 11 - 32 x 100 x 0,1 - 32 x 1)
=(81,6 x 10) x (32 x 11 - 32 x 10 - 32 x 1)
=816 x [32 x (11-10-1)]
=816x (32x0)
=0
tính nhanh nha
{ 68,5 x 25,9 - 14,75} x {32 x 11 - 3200 x 0,1 - 32}
tk mk mk tk lại thề đấy
= {68,5 x 25,9 - 14,75} x { 32 x 10 + 32 - 320 - 32}
= {68,5 x 25,9 - 14,75} x 320 + 32 - 320 - 32
={ 68,5 x 25,9 - 14,75} x 0
= 0 tk nhé
Bài 3: Tính nhanh:
a)8,8 : 2,5 + 7,6 : 2,5 – 6,4 : 2,5
b) 0,25 x 1200 + 125 x 1,5 x 2 – 250 x 2,6
c) ( 32 x 11 – 3200 x 0,1 – 32 ) : ( 81,6 x 27,3 – 17,3 x 81,6 )
a) 8,8 : 2,5 + 7,6 : 2,5 - 6,4 : 2,5
= (8,8 + 7,6 - 6,4) : 2,5
= 10 : 2,5
= 4
\(a.\)
\(8.8:2.5+7.6:2.5-6.4:2.5\)
\(=\left(8.8+7.6-6.4\right):2.5\)
\(=10:2.5\)
\(=4\)
\(b.\)
\(0.25\times1200+125\times1.5\times2-250\times2.6\)
\(=250\times1.2+250\times1.5-250\times2.6\)
\(=250\times\left(1.2+1.5-2.6\right)\)
\(=250\times0.1=25\)
\(c.\)
\(\left(32\times11-3200\times0.1-32\right):\left(81.6\times27.3-17.3\times81.6\right)\)
\(=\left[32\times\left(11-10-1\right)\right]:\left[81.6\times\left(27.3-17.3\right)\right]\)
\(=0\)
40 x 50=....
80 x 40=....
3200:8=....
40 * 50 =2000
80 * 40 =3200
3200 : 8=400
Tính nhanh
32 x 98 + 320 x 0,1 + 3200 x 0,01
Mk đang cần gấp
\(32\cdot98+320\cdot0,1+3200\cdot0,01\)
\(=32\cdot98+32\cdot1+32\cdot1\)
\(=32\cdot\left(98+1+1\right)\)
\(=32\cdot100\)
\(=3200\)
32 x 98 + 320 x 0,1 + 3200 x 0,01
= 32 x 98 + 32 x 1 + 32 x 1
= 32 x (98 + 1 + 1) = 32 x 100 = 3200
32 x 98 + 320 x 0,1 + 3200 x 0,01
=32 x (98+1+1)
=32 x100
=3200
k cho mình nha