`19/8 + 5/4 + 27/7`
`= 133/56 + 70/56 + 216/55`
`= (133+70+216)/56`
`= 419/56`
\(\dfrac{19}{8}+\dfrac{5}{4}+\dfrac{27}{7}\)
\(=\dfrac{133}{56}+\dfrac{70}{56}+\dfrac{216}{56}\)
\(=\dfrac{419}{56}\)
`19/8 + 5/4 + 27/7`
`= 133/56 + 70/56 + 216/55`
`= (133+70+216)/56`
`= 419/56`
\(\dfrac{19}{8}+\dfrac{5}{4}+\dfrac{27}{7}\)
\(=\dfrac{133}{56}+\dfrac{70}{56}+\dfrac{216}{56}\)
\(=\dfrac{419}{56}\)
a) 3 x X x 2/3 = 4/5
b) 3,94 x 18,24 + 18,24 x 3,72 + 18,24 x 2,34
c) 8/9 + 14/27 + 1/9 + 13/27
d) 8/19 x 2/7 + 8/19 x 1/7 + 8/19 x 4/7
tính nhanh
17/19+27/35-17/19+1
1/3x 4/5 + 1/3 x 6/5 +2/3
4/7 x 2/9 + 4/7 x 7/9 + 2/3
19 và 5/8 : 7/12 - 15 và 1/4 : 7/12
* 19 và 5/8 là hỗn số *
Tính
a) 4/3*7 + 4/7*11 + 4/11*15 + 4/15*19 + 4/19*23 + 4/23*27
b) 1/2*3 + 1/3*4 + 1/4*5 + 1/5*6 +1/6*7
c) 2/3*5 + 2/5*7 + 2/7*9 + 2/9*11 + 2/11*13 + 2/1*2 + 2/2*3 + 2/3*4 + 2/8*9 + 2/9*10
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30=
1:Tính :
a,1/2+7/8+7/19+42/47 b,3/2+6/5+17/8+36/27 c,3/5+(2/8+2/5+6/8) d,5 3/7+(2 5/21-1 2/3)
Thắng xếp các số thành 4 hàng ABCD như sauA 1, 8, 9, 16, 17, 24, 25, ...B 2, 7, 10, 15, 18, 23, 26,...C 3, 6,11, 14, 19, 22, 27, ...D 4, 5, 12, 13, 20, 21, 28, ...Hỏi số 2018 nằm ở hàng nào
tính bằng cách thuận tiện nhất
3/5 x 8/27 x 5/3 7/19 x 1/3 + 7/19 x 2/3
Tính nhanh
a) 45/23 × 7/25 + 1/5 × 7/23
b) 7/13 × 5/8 + 7/8 × 3/13 + 7/13
c) 7/19 × 5/13 + 8/19 × 7/13 - 7/19
d) 2/17 × 6/13 + 5/17 × 6/13 + 10/17 × 4/13 + 10/17 × 2/13
Các bạn giúp mk với nha
tính bằng cách thuận tiện nhất
3/5 x 8/27 x 5/3 7/19 x 1/3 + 7/19 x 2/3
ai nhanh thì tick