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17 tháng 3 2020
a. ( 48 x 0,75 - 240 : 10 ) - ( 16 x 0,5 - 16 : 4 )
=(36-24)-(8-4)
=12-4
=8
b. (1000 x 0,1 - 900 x 0,1 - 90 x 0,1 ) x ( 142 x 0,5 - 240 x 0,25 )
=(100-90)x(71-60)
=10x11
=110
# mui #
NT
Nguyễn Thị Thương Hoài
Giáo viên
VIP
21 tháng 12 2023
a; 17,98 x 0,4 x 2,5
= 17,98 x (0,4 x 2,5)
= 17,98 x 1
= 17,98
b, 8,89 x 8 x 12,5
= (8 x 12,5) x 8,89
= 100 x 8,89
= 889
3 tháng 1 2019
67,8 - 24,55 = 43,25
67,8 + 24,55 = 92,35
76,8 x 3,04 = 233,472
2,06 x 5,85 = 12,051
25,8 - 16,48 = 9,32
25,8 + 16,48 = 42,28
4,05 x 1,2 = 4,86
Chúc em học tốt!!!
P
4
26 tháng 1 2017
x.3,14+x.5,86-x=2012
x.(3,14+5,86)-x=2012
x.9-x=2012
x.(9-1)=2012
x.8=2012
x=2012:8
x=251,5
NH
5
19 tháng 2 2019
Ui bài khó quá mk ko làm đc xl nhé.....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................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19 tháng 2 2019
X:0,1+X:0,25+X:0,5+X×4
⇒ x :0,1+ x :0,25+ X:0,5+x:0,25=2018
⇒ X:(0,1+0,25+0,5+0,25)=2018
⇒ X:1,1=2018
⇒ x=2018 x1,1=2219,8
Vậy X=2219,8
D
3
20 tháng 7 2017
\(\frac{x}{0,25}+\frac{x}{0,5}+\frac{x}{0,1}+x+\frac{x}{0,01}=23,4\)4
\(x\left(\frac{1}{0,25}+\frac{1}{0,5}+\frac{1}{0,1}+1+\frac{1}{0,01}\right)=23,4\)
\(117x=23,4\)
x=0,2
nhớ vote nhoa!
D
1
\(5,86+16,48:0,5\times0,1\)
\(=5,86+16,48\times2:10\)
\(=5,86+32,96:10\)
\(=5,86+3,296\)
\(=9,156\)