x + 90 = 250 - 50
0,925 ha = 90 .... 250 ....
13,05 dm3 = ... cm3
2 giờ 10 phút = ... giờ
9,005 tấn = 90 ... 50 ...
Tính giá trị của mỗi biểu thức sau:
a) 250 + 250 x 2
(250 + 250) x 2
b) 750 – 50 x 5
(750 – 50) x 5
c) 210 x 4 – 4 x 210
3 x (270 : 9) x 0
a) \(250 + 250 × 2 = 250 + 500 = 750 \\ (250 + 250) × 2 = 500 × 2 = 1 000\)
b)\( 750 – 50 × 5 = 750 – 250 = 500\\
(750 – 50) × 5 = 700 × 5 = 3 500\)
c) \(210 × 4 – 4 × 210 = 840 – 840 = 0\\
3 × (270 : 9) × 0 = 0\)
Đúng ghi Đ, sai ghi S:
a) 86 – 16 = 70
b) 23 x 2 – 1 = 23
c) 250 : 5 + 5 = 25
d) 40 + 80 : 4 = 30
e) 80 + 4 : 2 = 42
f) 70 + 30 : 2 = 50
g) 90 + 30 x 3 = 180
h) 70 + 30 : 2 = 85
a) 86 – 16 = 70
b) 23 x 2 – 1 = 23
c) 250 : 5 + 5 = 25
d) 40 + 80 : 4 = 30
e) 80 + 4 : 2 = 42
f) 70 + 30 : 2 = 50
g) 90 + 30 x 3 = 180
h) 70 + 30 : 2 = 85
Câu 4. Tính nhanh 250 x 15 + 250 x 50 + 250 x 35
250 x 15 + 250 x 50 + 250 x 35.
= 250 x ( 15 + 50 + 35 ).
= 250 x 100
= 25000.
k mik nha!!
#Học tốt.
\(250\times15+250\times50+250\times35\)
\(=250\times\left(15+50+35\right)\)
\(=250\times100\)
\(=25000\)
#hoktot<3#
Ta có:
\(250\times15+250\times50+250\times35\)
\(=250\times\left(15+50+35\right)\)
\(=250\times100\)
\(=25000\)
250 + 90 x 10 x 9 =?
250 + 90 x 10 x 9
= 250 + 900 x 9
= 250 + 8100
= 8350
250+90x10x9
=250+900x9
=250+8100
=8350
=250 + ( 90 * 10 * 9 )
= 250 + 8100
= 8350
x+50=250
x*50=250
x * 50 = 250
x = 250 : 50
x = 5
k mình bạn nha!
X x 50 = 250
x = 250 : 50
x = 5
Happy new year ! Chúc bạn lun vui vẻ nhé !
x + 50 = 250 + 360
x + 50 = 250 + 360
x + 50 = 610
x = 610 - 50
x = 560
x + 50 = 250 + 360
x + 50 = 610
x = 610 - 50
x = 560
( x - 25 ) nhan 17 = 34
145 + ( 150 - x ) = 250
( 2 nhân x - 7 ) nhan 81 = 0
x - 90 : 15 = 32
520 - ( x - 5 ) = 250 : 5
( x - 25) x 17 = 34
=> x - 25 = 34 : 17
x - 25 = 2
=> x = 2 + 25
x = 27
145 + (150 - x) = 250
=> 150 - x = 250 - 145
150 - x = 105
=> x = 150 - 105
x = 45
(2x - 7) x 81 = 0
=> 2x - 7 = 0 : 81
2x - 7 = 0
=> 2x = 7
=> x = 7 : 2 = 3,5
x - 90 : 15 = 32
=> x - 6 = 32
=> x = 32 + 6
x = 38
520 - (x - 5) = 250 : 5
=> 520 - (x - 5) = 50
=> x - 5 = 520 - 50
x - 5 = 470
=> x = 470 + 5
x = 475
t i c k nhé!! 346457567684786896789
a ) \(\left(x-5\right).17=34\)
=> \(x-5=2\)
=> \(x=7\)
b ) \(145+\left(150-x\right)=250\)
=> \(150-x=105\)
=> \(x=150-105\)
=> \(x=45\)
c ) \(\left(2.x-7\right).81=0\)
=> \(2x-7=0\)
=> \(2x=7\)
=> \(x=\frac{7}{2}\)
d ) \(x-90:15=32\)
=> \(x-6=32\)
=> \(x=38\)
Mấy cái dấu chấm đó là nhân đó nhé