56+324
Những câu hỏi liên quan
Tính:
a, 197 635 + 81 324
b, 68 543 – 56 627
c, 178 x 241
d, 6420 : 321
a, 197 635 + 81 324
b, 68 543 – 56 627
c, 178 x 241
d, 6420 : 321
Đúng 0
Bình luận (0)
Tính nhanh :
a) 55 + 56 + 56 +57 + 58 - 35 - 36 - 37 - 38
b) ( 461 - 78 + 40 ) - ( 461 - 78 - 60 )
c) - 323 + 874 - ( 874 - 324 - 241 )
Phân tử khối của hợp chất tạo bởi Al2(SO4)3 là bao nhiêu? ( Biết Fe =56, S=32, O=16)
A)342
B)340
C)305
D)324
So sánh : 324490 và 76556
Giúp mình đi mình sẽ tick cho 0 tick luôn!
Tính giá trị biểu thức
A=1/4+1/12+1/36+1/108+1/324+1/972
B=1/2+5/6+11/12+19/20+29/30+41/42+55/56
\(A=\frac{1}{4}+\frac{1}{12}+\frac{1}{36}+\frac{1}{108}+\frac{1}{324}\)
\(3A=3\left(\frac{1}{4}+\frac{1}{12}+\frac{1}{36}+\frac{1}{108}+\frac{1}{324}+\frac{1}{972}\right)\)
\(3A=\frac{3}{4}+\frac{3}{12}+\frac{3}{36}+\frac{3}{108}+\frac{3}{324}+\frac{3}{927}\)
\(3A=\frac{3}{4}+\frac{1}{4}+\frac{1}{12}+\frac{1}{36}+\frac{1}{108}+\frac{1}{324}\)
\(2A=3A-A\)
\(2A=\left(\frac{3}{4}+\frac{1}{4}+\frac{1}{12}+\frac{1}{12}+\frac{1}{36}+\frac{1}{108}+\frac{1}{324}\right)-\left(\frac{1}{4}+\frac{1}{12}+\frac{1}{36}+\frac{1}{108}+\frac{1}{324}+\frac{1}{972}\right)\)
\(2A=\frac{3}{4}-\frac{1}{927}\)
\(2A=\frac{729-1}{972}=\frac{728}{972}=\frac{182}{243}\)
\(A=\frac{182}{243}:\frac{1}{2}\)
\(A=\frac{364}{243}\)
Đúng 0
Bình luận (0)
A=1/4+1/12+1/36+1/108+1/324+1/972
=243/972+81/972+27/972+9/972+3/972+1/972
=364/972
=91/243
Đúng 0
Bình luận (0)
\(B=\frac{1}{2}+\frac{5}{6}+\frac{11}{12}+\frac{19}{20}+\frac{29}{30}+\frac{41}{42}+\frac{55}{56}\)
\(B=\left(1-\frac{1}{2}\right)+\left(1-\frac{1}{6}\right)+\left(1-\frac{1}{12}\right)+\left(1-\frac{1}{20}\right)+\left(1-\frac{1}{30}\right)+\left(1-\frac{1}{42}\right)+\left(1-\frac{1}{56}\right)\)
\(B=1.9-\left(\frac{1}{2}+\frac{1}{6}+...+\frac{1}{56}\right)\)
\(B=9-\left[\left(1-\frac{1}{2}\right)+\left(1-\frac{1}{6}\right)+...+\left(1-\frac{1}{56}\right)\right]\)
\(B=9-\left(1-\frac{1}{56}\right)\)
\(B=9-\frac{55}{56}\)
\(B=\frac{449}{56}\)
Đúng 0
Bình luận (0)
điền dấu lớn hơn bé hơn hoặc bằng
124-32 324-217 726+34 512-431 123-28+56 928+261-988
124-32 < 324-217
726+34 > 512-431
123-28+56 < 928+261-988
HT và $$$
124-32<324-217
726+34>512-431
123-28+56<928+261-988
1)Tính:
a) A=1/2+5/6+11/12+19/20+29/30+41/42+55/56+71/72+89/90
b) B=(3/4)(8/9)(15/16)(24/25)(35/36)(48/49)(63/64)
c) C=1/4+1/12+1/36+1/108+1/324+1/92
\(\frac{1}{2}+\frac{5}{6}+\frac{11}{12}+\frac{19}{20}+...+\frac{89}{90}\)
\(=1-\frac{1}{2}+1-\frac{1}{6}+1-\frac{1}{12}+1-\frac{1}{20}+...+1-\frac{1}{90}\)
\(=9-\left(\frac{1}{2}+\frac{1}{6}+\frac{1}{12}+\frac{1}{20}+...+\frac{1}{90}\right)\)
\(=9-\left(\frac{1}{1.2}+\frac{1}{2.3}+\frac{1}{3.4}+\frac{1}{4.5}+...+\frac{1}{9.10}\right)\)
\(=9-\left(1-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+\frac{1}{3}-\frac{1}{4}+....+\frac{1}{9}-\frac{1}{10}\right)\)
\(=9-\left(1-\frac{1}{10}\right)\)
\(=9-\frac{9}{10}=\frac{81}{10}\)
Đúng 0
Bình luận (0)
A = 2004×37+2004+2×2004+2004×59+2004 324×321−201×324−324×101−18×324
mk chịu.bó tay.com.vn. cậu ơi hình như sai đề
Đúng 0
Bình luận (0)
tính nhanh 2004 . 37 + 2004 + 2 * 2004 + 2004 * 59 + 2004 / 324 * 321 - 201 * 324 - 324 * 101 - 18 * 324
\(\frac{2004.37+2004+2.2004+2004.59+2004}{324.321-201.324-101.324-18.324}\)
\(=\frac{2004.\left(37+1+2+59+1\right)}{324.\left(321-201-101-18\right)}\)
\(=\frac{2004.100}{324.1}\)
\(=\frac{200400}{324}\)
\(=\frac{16700}{27}\)
Đúng 1
Bình luận (0)
cái con THANH NGÂN ngu thế