\(=\left(\dfrac{6}{8}+\dfrac{2}{8}\right)\times2=1\times2=2\)
= (6/8 + 2/8) x 2
= 1 x 2
= 2
1) 1/3 x 1/2 x 3/7 2) 5/4 x 1/3 + 1/7 3) 8 x ( 8/9-2/3 ) 4) 5/6 x 48/20 x 1/2 5) ( 2/5 + 3/4 ) x 8 6) 10 x ( 1/2-1/5 )
Bài 299: Tính
1) 1/3 x 1/2 x 3/7
2) 5/4 x 1/3 + 1/7
3) 8 x ( 8/9-2/3 )
4) 5/6 x 48/20 x 1/2
5) ( 2/5 + 3/4 + x 8
6) 10 x ( 1/2 - 1/5 )
Trình bày rõ cách làm giúp ạ!!
a)3/2 x 4/7 8/21 : 2/3 8/21 : 4/7 4/7 x 2/3
b)3/11 x 2 6/11 : 3/11 6/11 : 2 2 x 3/11
c)4 x 2/7 8/7 : 2/7 8/7 : 4 2/7 x 4
a) 1+4/3
b) 5/9 : 2/3
c ) 4/3-1/3x5/2
d) ( 3/2-3/8):1/2
e) 15/16 : 3/8 x 3/4
f) 7/19 x 1/3 x 7/19 x 2/3
g) 3/5x 8/27 x 25/3
h) 1/5 + 4/11 + 4/5 + 7/11
2/3 = 2 x 4/ 3 x 4 =......../.........
8/14 = 8 : 2/ 8 : 2/ 14 : 2 =........./..........
5/9 = 5 x......./ 9 x 3 =......../.........
35/ 40 = 35 : 5/ 40 : ............. =......./...........
giúp mình với trả lời mình tick cho nhé
Tính: a) 3 x 4 x 7 / 5 x 3 x 4 b) 2 x 5 x 6 x 8 / 6 x 2 x 8 x 9 c) 4 x 5 x 6 / 3 x 10 x 8
Câu 1:tính
a,3/4+1/8=.......... b,4/5+3/10=..............
x-5/7=3/5*1/2 x*2/3=8/8+3/4
........................... ..........................
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Tính bằng cách thuận tiên nhất:
1):(3/4 x 5/97 + 1/9 x 13/47) x (1/5 - 7/25 x 5/7)
2): 8/17 x 4/15 + 8/17 x 22/15 - 8/15 x 9/17
3): 2021/2 x 1/3 + 4042/4 x 1/5 + 6063/3 x 22/15
4); 4/7 x 2/13 + 8/13 :7/4 + 4/7 : 13/2 + 4/7 x 1/13
5): 2022 x 2021 - 1/ 2021 + 2022 x 2020
6): 18 x 123 + 9 x 4567 x 2 + 3 x 5310 x 6 / (2 + 4 + 6 + 8 + ...+20 + 22) + 48
7): A= 2021 x 2021 x 202020 - 2020 x 2020 x 20212021 / 2020 x 20192019
Tính nhanh:
3 - [2/4 x 1/2 + 2/4 x 3/2 + 24/8 x 2/4 + 2/4]
tính bằng cách thuận tiện nhất :
1/2 x 2/3 x 3/4 x 4/5 x 5/6
1/10 x 2/9 x 3/8 x 4/7 x 5/6 x 6/5 x 7/4 x 3/8 x 9/2
