6 + 17 =
32 + 4 =
56 + 9 =
768 + 90 =
35467 + 45673 =
18763987654 + 2345678098 =
ai xong thứ 3 mk k
a .(18 – 9 x 2) x (2 + 4 + 6 + 8 + 10)
b.(7 x 8 – 56 ) : (2 + 4 + 6 + 8 + 112)
c. (2 + 125 + 6 + 145 + 112) x (42 – 6 x 7)
d.(12 x 6 – 12 x 4 – 12 x 2) x ( 347 + 125)
e(a x 7 + a x 8 – a x 15) : (1 + 2 + 3 + ........ + 10)
f.58 – 58 x (6 + 54 – 60)
g.32 + 63 x a x ( a x 1 – a : 1) + 32 x 8 + 32
h.(1 + 2 + 3 + 4 + .... + 9) x (21 x 5 – 21 – 4 x21)
i.(9 x 7 + 8 x 9 – 15 x 9) : (1 + 3 + 5 + 7 + ........+ 17 + 19)
k.(2 + 4 + 6 + 8 + ... + 20) x (56 x 3 – 72 : 9 x 21)
1.(18 - 18) x (2 + 8) + ( 4 + 6) + 10 = 30
có rút gọn phân số 35/6 về phân số đc ko ? Nếu có thì mn rút gọn cho mik nhé !
Ai xong tr tui k cho
a) 1 x 354 + 21 =
b) 9 x 768 - 56 =
Ai nhanh mk tk cho nhưng tk cho mk nhé
1 x 354 + 21 = 375
9 x 768 - 56 = 6856
k mk nha,mk nhanh nhất
a,1*354+21=375
b,9*768-56=6856
Tk mình nhá mình tk lại cho
tính bằng cách thuận tiện nhất:
a, 6/7 x 16/15 x 7/6 x 21/32 =
b, 21/17 x 13/14 x 56 x 3/42 =
AI NHANH NHẤT CHO 3 K NHANH LÊN ĐANG GẤP !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!............................................
b,21/17x13/14x56x3/42
=21/17x3/42x56x13/14
=21x3/17x42 x 56x13/14
=21x3/17x21x2 x 14x4x13/14
=3/17x2 x 4x13
=3/24 x 52=3x52/24
=3x52/3x8
=52/8=13/2
a, 6/7 x 16/15 x 7/6 x 21/32
=(6/7 x 7/6)x16/15x21/32
=16/15x21/32
=16x21/15x32
=16x3x7/3x5x16x2
=7/5x2=7/10
6x + 9 = 32
x - 90 + 100 = 290
a + 1 - 3 = 6
AI tíck mk thì mk tíck lại
mk KHÔNG thất hứa đâu
6x + 9 =32
6x = 32 - 9
6x =23
x = 3,333333333.......... đề sai
x - 90 + 100 = 290
x - 90 = 290 - 100
x-90 =190
x =280
a + 1 - 3 = 6
a+1 = 6 + 3
a+1 = 9
a =8
mk nhầm lẫn 1 tí
đáng ra 6x + 9 = 33
_________________________
6x + 9 = 33
6x = 33 - 9
6x = 24
x = 24 : 6
x = 4
x - 90 + 100 = 290
x - 90 = 290 + 100
x - 90 = 390
x = 390 - 90
x = 290
a + 1 - 3 = 6
a + 1 = 6 - 3
a + 1 = 3
a = 3 - 1
a = 2
tính giá trị biểu thức
1/2x3/4:6/5 2/3+1/6:7/12 8x3/5:12/5 4/9+3/4-1/3
2 bn lm xong trước mk tick
1: \(=\dfrac{3}{8}\cdot\dfrac{5}{6}=\dfrac{15}{24}=\dfrac{5}{8}\)
2: \(=\dfrac{2}{3}+\dfrac{12}{42}=\dfrac{2}{3}+\dfrac{2}{7}=\dfrac{14+6}{21}=\dfrac{20}{21}\)
3: \(=\dfrac{24}{5}\cdot\dfrac{5}{12}=2\)
4: \(=\dfrac{1}{3}+\dfrac{3}{4}=\dfrac{4+9}{12}=\dfrac{13}{12}\)
`1/2xx3/4:6/5= 1/2 xx 3/4 xx 5/6 = 3/8 xx 5/6 =5/16`
`2/3+1/6:7/12 = 2/3 + 1/6 xx 12/7 = 2/3 + 2/7 = 14/21 + 6/21 = 20/21`
`8xx3/5:12/5= 8xx 3/5 xx 5/12 = 24/5 xx 5/12 = 2`
`4/9+3/4-1/3= (16/36 + 27/36 ) - 1/3 = 43/36 - 1/3 = 31/36`
`1/2xx3/4:6/5`
`=1/2xx3/4xx5/6`
`=3/8xx5/6`
`=15/48`
`=5/16`
__
`2/3+1/6:7/12`
`=2/3+1/6xx12/7`
`=2/3+2/7`
`=14/21+6/21`
`=20/21`
__
`8xx3/5:12/5`
`=8xx3/5xx5/12`
`=8xx1/4`
`=8/4`
`=2`
__
`4/9+3/4-1/3`
`=(4/9-1/3)+3/4`
`=(4/9-3/9)+3/4`
`=1/9+3/4`
`=4/36+27/36`
`=31/36`
C = ( 88 - 1/6 - 2/7 - 3/8 - ... - 88/93 ) / ( -1/12 - 1/14 - 1/16 - ... - 1/186 )
D = 1 - 5/6 + 7/12 - 9/20 + 11/30 - 13/42 + 15/56 - 17/12 + 19/90
các cou ui zải zúp mk bài này nhé:333
mk hứa sẽ chấm đúng:))
trâng trọn cảng ơm ^-^
3/2 - 5/6+ 7/12- 9/20 +11/30-13/42 +15/56 - 17/72+ 19/90
\(\frac{3}{2}-\frac{5}{6}+\frac{7}{12}-\frac{9}{20}+\frac{11}{30}-\frac{13}{42}+\frac{15}{56}-\frac{17}{72}+\frac{19}{90}\)
\(=\frac{1+2}{1.2}-\frac{2+3}{2.3}+\frac{3+4}{3.4}-\frac{4+5}{4.5}+\frac{5+6}{5.6}-\frac{6+7}{6.7}+\frac{7+8}{7.8}-\frac{8+9}{8.9}+\frac{9+10}{9.10}\)
\(=1+\frac{1}{2}-\frac{1}{2}+\frac{1}{3}+\frac{1}{4}-...-\frac{1}{8}-\frac{1}{9}+\frac{1}{9}+\frac{1}{10}\)
\(=\frac{11}{10}\)
3/2-5/6+7/12-9/20+11/30-13/42+15/56-17/72+19/90
Tính
3/2 + 5/4 + 9/8 + 17/6 + 33/32 + 65/2 - 7
giúp mk
3/2 + 5/4 + 9/8 + 17/6 + 33/32 + 65/2 - 7
=(3/2+5/4+33/32+65/2) + 9/8+17/6 -7
= 1161/32 + 95/24 - 7
= 3191/26
3/2 + 5/4 + 9/8 + 17/6 + 33/32 + 65/2 - 7 = \(\frac{3191}{96}\)