Các câu hỏi tương tự
Bài 1: Tính
a. 5 × -7/10
b. 4/5 × -3/22
c. 4/9 + 4/3 × 16/4
d. 11/22 - 3/9 × 14/21
Bài 2: Tính hợp lý
A = 6/13 × 5/7 + 6/13 × 2/7 + 17/13
B = 11/15 × 4/11 + 11/15 × 5/11 + 11/15 × 2/11
C = ( 19/64 - 33/22 + 24/51 ) × ( 1/5 - 1/15 - 2/15 )
D = 8/13 × 7/12 + 8/13 × 5/12 - 1/12
1 tháng 3 2023 lúc 12:18
Tính thuận tiện
a) A=(15 - 6 13/18) : 11 1/27 - 2 1/8 : 1 11/40
b) B=(-3,2) . -15/64 + (0,8 - 2 4/15): 3 2/3
c) C= -7/9 . 4/11 + -7/9. 7/11 + 5 7/9
d) D= 50% .1 1/3 . 10 . 7/35 . 0,75
e) E= (2/5)^2 + 5 1/2 (4,5 - 2) + 23/-4
tính P = 5 /(2 . 1) + 4 / (1 . 11) + 3 / (11 . 2) + 1 / (2 . 15) + 13 / (15 . 4)
P=5/2×1+4/1×11+3/11×2+1/2×15+13/15×4.tính P.
Bài 1 Tính nhanh
a) -3/7 + 5/13 + 3/7
b) -5/21+-2/21+8/24
c) -5/11+(-6/11+2)
d) (-1/32+1/2)+15/32
e)5/17+ -6/13 + 3/4 + 7/-13+12/17
f) 7/23+-18/18+-4/9+16/23+-5/8
g)1/3+-3/4+3/5+-1/36+1/15+-2/9
h)-1/2+1/3+-1/4+-2/8+4/18+4/9
Tính :
C= 1/5+1/10+1/20+1/40+...+1/1280D= 2/1*3+2/3*5+2/5*10+2/7*9+2/9*11+2/11*18+2/13*15E= 4/3*7+4/7*11+4/11*15+4/15*19+4/19*23+4/23*27G= 1/2+1/6+1/12+1/20+1/30+1/42+...+1/110H= 3/1*2+3/2*3+3/3*4+3/4*5+...+3/9*10Giúp mk nha *.*
1. Tính
a, 11/15 + - 7/10 + 13/30
b, 7/9 + -1/4 + 3/5
c, -5/21 + -5/14 + 4/35
d, 2/7 + 1/9 + 1/7 + 5/9 + 8/14
e, -4/9 + 8/15 + -2/11 + 5/-9 + 7/15
Không quy đồng hãy tính hợp lý tộng sau:
B=5/2*1 + 4/1*11 + 3/11*2 + 1/2*15 + 13/15*4
Tính nhanh : a, 4 /11/23 -9/14+2 /12/23-5/4
b, 2 /13/27-7/15+3/14/27-8/15
c,11/1/4-(2/5/7+5/1/4)
( ../../..: hỗn số , ../..: phân số)
Tính
A = ( 3/4 : 2/3 ) : 3/5. B = (11/12 : 33/16 ) ×3/5
C = (5/12 × 21/15 ) :1/4 D = 3/4 : (2/3 : 3/5 )
E = (2/7 : 5/4) × (5/8 : 2 )
F = (11/15 × 35/44) : (1/7×4/13)