Tính :
\(A=\frac{4^5x13+32^2x65}{4^4x104}\)
Những câu hỏi liên quan
Tính bằng hai cách
A. 17/19 x12/15 x19/17
B. (5/7+9/7) x 21/28
C. 4/5x13/14+13/14x1/5
#Toán lớp 4
câu A cách 1
\(\dfrac{17}{19}\times\dfrac{12}{15}\times\dfrac{19}{17}\)
=\(\dfrac{17\times12\times19}{19\times15\times17}\)
=\(\dfrac{12}{15}\)
câu A cách 2
\(\dfrac{17}{19}\times\dfrac{12}{15}\times\dfrac{19}{17}\)
=\(\dfrac{17}{19}\times\dfrac{19}{17}\times\dfrac{12}{15}\)
=1 x \(\dfrac{12}{15}\)
=\(\dfrac{12}{15}\)
Đúng 1
Bình luận (0)
7 tháng 3 2023 lúc 19:08
Tính bằng hai cách
A. 17/19 x12/15 x19/17
B. (5/7+9/7) x 21/28
C. 4/5x13/14+13/14x1/5
Cách hai:
A; \(\dfrac{17}{19}\) x \(\dfrac{12}{15}\) x \(\dfrac{19}{17}\)
= \(\dfrac{68}{95}\) x \(\dfrac{19}{17}\)
= \(\dfrac{4}{5}\)
Đúng 2
Bình luận (0)
Cách 1:
A. \(\dfrac{17}{19}\) x \(\dfrac{12}{15}\) x \(\dfrac{19}{17}\)
= (\(\dfrac{17}{19}\) x \(\dfrac{19}{17}\)) x \(\dfrac{12}{15}\)
= \(1\) x \(\dfrac{12}{15}\)
= \(\dfrac{4}{5}\)
Đúng 1
Bình luận (0)
B; Cách 1: (\(\dfrac{5}{7}\) + \(\dfrac{9}{7}\)) x \(\dfrac{21}{28}\)
= 2 x \(\dfrac{3}{4}\)
= \(\dfrac{3}{2}\)
Cách 2: (\(\dfrac{5}{7}+\dfrac{9}{7}\)) x \(\dfrac{21}{28}\)
= \(\dfrac{5}{7}\) x \(\dfrac{21}{28}\) + \(\dfrac{9}{7}\) x \(\dfrac{21}{28}\)
= \(\dfrac{15}{28}\) + \(\dfrac{27}{28}\)
= \(\dfrac{42}{28}\)
= \(\dfrac{3}{2}\)
Đúng 1
Bình luận (0)
2^4-50:25+37
32+5x13-13-3x2^3
2x(195+35:7):8+195
4x(3^2x(5^2+2^2):11)-26+2008
a, 51
b, 60
c, 245
Tính: \(A=\left(1+\frac{4}{5}\right)\left(1+\frac{4}{12}\right)\left(1+\frac{4}{21}\right)\left(1+\frac{4}{32}\right)...\left(1+\frac{4}{24021}\right)\)
\(a^2=\frac{1}{1x2}+\frac{1}{2x7}+\frac{1}{7x5}+\frac{1}{5x13}+\frac{1}{13x8}+\frac{1}{8x19}+\frac{1}{19x11}\)\(+\frac{1}{11x25}\)
TÌM CÁC SỐ a
Tính:
\(A=\frac{4^5.13+32^2.65}{4^4.104}\)
\(A=\frac{4^5.13+32^2.65}{4^4.104}=\frac{2^{10}.13+2^{10}.13.5}{2^8.2^3.13}=\frac{2^{10}.13.\left(1+5\right)}{2^{11}.13}=\frac{6}{2}=3\)
Vậy A = 3
Đúng 0
Bình luận (0)
Tính A=\(\frac{^{4^{50}+24.8^{32}}}{10.64+4^{48}}\)
Xem chi tiết
Tính nhanh
a) 7/12x6/11+7/12x5/11-2 7/12 S
b)-5/9x-6/13+5/-9x-5/13-5/9
c)0,8x-15/14-4/5x13/14-1 2/5
d)-75%x6/7+5%x6/7+7/10x1 1/7
giúp với
Giải bằng cách hợp lý nhất:
\(\dfrac{1}{3x5}x\dfrac{4}{5x13}x\dfrac{2}{13x17}x\dfrac{3}{17x23}x\dfrac{5}{23x33}\)