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VQ
23 tháng 3 2022
10.213
11. 2 giờ 55 phút
12. 4 ngày 21 giờ
13.
a: 6,008
b: 4500
c: 5,628
d: 4,009
23 tháng 1 2022
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AK
10 tháng 4 2018
\(3-\frac{4}{5}+\frac{3}{10}\)
\(=\frac{15}{5}-\frac{4}{5}+\frac{3}{10}\)
\(=\frac{11}{5}+\frac{3}{10}\)
\(=\frac{22}{10}+\frac{3}{10}\)
\(=\frac{25}{10}\)
\(=\frac{5}{2}\)
Chúc bạn học tốt !!!
NC
5
17 tháng 12 2017
8,5 + 6,5 - ( 10 - 3,3 )
= 8,5 + 6,5 - 6,7
= 15 - 6,7
= 8,3
NT
Nguyễn Thị Thương Hoài
Giáo viên
VIP
4 tháng 11 2023
Bài 1: A = (\(\dfrac{7}{13}\) + \(\dfrac{6}{13}\)) x 100 - 13 x a
Thay a = 10 vào A ta có:
A = (\(\dfrac{7}{13}\) + \(\dfrac{6}{13}\)) x 100 - 13 x 10
A = \(\dfrac{13}{13}\) x 100 - 130
A = 100 - 130
A = - 30
Thay a = 987 vào biểu thức A ta có:
A = (\(\dfrac{7}{13}\) + \(\dfrac{6}{13}\)) x 100 - 13 x 987
A = \(\dfrac{13}{13}\) x 100 - 12831
A = 100 - 12831
A = -12731
NT
0
10 - 2,42 + 5,58
= 10 - (2,42 + 5,58)
= 10 - 8
= 2
10 - 2,42 + 5,58
= 7,58 + 5,58
= 13,16
Chúc bạn học tốt !!!