33+25
tính hợp lí:
-33.(35-25)-35.(25-33)
33, 25 x 48 % - 33,25 x 0,4 + 33 ,25 x 0,02
\(33,25\times48\%-33,25\times0,4+33,25\times0,02\\ =33,25\times0,48-33,25\times0,4+33,25\times0,02\\ =33,25\times\left(0,48-0,4+0,02\right)\\ =33,25\times0,1\\=3,325\)
=33,25x0,48-33,25x0,4+33,25x0,02
=33,24x(0,48-0,4+0,02)
=33,25x 0,1
=3,325
4/21*19/33+25/42*19/33=.............
\(=\dfrac{19}{33}.\left(\dfrac{4}{21}+\dfrac{25}{42}\right)\)
\(=\dfrac{19}{33}.\dfrac{33}{42}\)
\(=\dfrac{19}{42}\)
Lời giải:
$=\frac{19}{33}\times (\frac{4}{21}+\frac{25}{42})$
$=\frac{19}{33}\times (\frac{8}{42}+\frac{25}{42})$
$=\frac{19}{33}\times \frac{33}{42}=\frac{19}{42}$
(5/17 - 8/33) - (25/33 - 12/17) - 20230
Quy ước: \(x^0=1\)
Đề bài: \(\left(\dfrac{5}{17}-\dfrac{8}{33}\right)-\left(\dfrac{25}{33}-\dfrac{12}{17}\right)-2023^0\)
\(=\dfrac{5}{17}-\dfrac{8}{33}-\dfrac{25}{33}+\dfrac{12}{17}-1\)
\(=\left(\dfrac{5}{17}+\dfrac{12}{17}\right)-\left(\dfrac{8}{33}+\dfrac{25}{33}\right)-1\)
\(=1-1-1\)
\(=-1\)
=(5/17-8/33)-(25/33-12/17)-2023^0
=5/17-8/33-25/33+12/17-1
=(5/17+12/17)+(-8/33-25/33)-1
=1+(-1)-1
=-1
Nhớ tick cho mình nha pls
-13.(35-25)-35.(25-33)
-13. (35 - 25) - 35. (25 - 33)
= -13. 10 - 35. (-8)
= -130 - (-280)
= -130 + 280
= 150
1/5*9+1/9*13+1/13*17+1/17*21+1/21*25+1/25*29+1/29*33+1/33*34
câu trả lời cho câu hỏi của Huong Le Thị Lan: 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+31+32.
=(1+32)+(2+31)+(3+30)+(4+29)+(5+28)+(6+27)+(7+26)+(8+25)+(9+24)+(10+23)+(11+22)+(12+21)+(13+20)+(14+19)+(15+18)+(16+17)
=33+33+33+33+33+33+33+33+33+33+33+33+33+33+33+33. =33.16 (dấu chấm là dấu nhân)=528
wow! mù mắt. Ido tính toán có khác!
C2:(32+1)x32:2=528
bạn tính thử xem đúng đấy.
Tính: (-8) . (-25) kết quả là:
A. 200
B. (-200)
C. (-33)
D. 33
Tính;
a)17*25+25*33+25*50
b)125*15-25*15
a) 17 x 25 + 25 x 33 +25 x 50 = 25 x (17 + 33 + 50)
= 25 x 100 = 2500
b) 125 x 15 -25 x 15 = 15 x (125 - 25)
= 15 x 100 = 1500
a. 17.25+25.33+25.50
= 25.(17+33+50)
= 25.100
= 2500
b. 125.15-25.15
= 15.(125-25)
= 15.100
= 1500
a)17*25+25*33+25*50
=25 x (17+33+50)
=25 x 100
= 2500
b)125*15-25*15
=15 x (125-25)
=15 x 100
=1500
15/19 x 25/33-15/19x14/33 giúp mình với . mình cần gấp
\(\dfrac{15}{19}\times\dfrac{25}{33}-\dfrac{15}{19}\times\dfrac{14}{33}\)
\(=\dfrac{15}{19}\times\left(\dfrac{25}{33}-\dfrac{14}{33}\right)\)
\(=\dfrac{15}{19}\times\dfrac{11}{33}\)
\(=\dfrac{5}{19}\)