a) 2/5 + 3/4=... 7/12 - 2/7 + 1/12=.... 12/17 - 5/17 - 4/17=....
b)675,39 + 342,14=..... 563,87 + 403,13 - 328,35=.....
mình đang cần gấp làm nhanh thì mình tick
a) 2/5+3/4; 7/12-2/7+1/12; 12/17-5/17-4/17
b) 675,39 + 342,14; 563,87 + 403,13 - 328,35
a) 2/5+3/4=23/20
7/12-2/7+1/12=8//21
12/17-5/17-4/17=3/17
b) 675,39+342,14=1017,53
563,87+403,13-328,35=638,65
a) 2/5+3/4
=8/20+15/20
=21/20
7/12-2/7+1/12
=7/12+1/12-2/7
=1/4-2/7
=7/28-8/28
=-1/28
12/17-5/17-4/17
=12/17-9/17
=3/17
b) 675,39+342,14
= 1017,53
563,87+403,13-328,35
= 967-328,35
= 638,65
2/5 + 3/4 =... 7/12 - 2/7 + 1/12 =... 12/17 - 5/17 - 4/17 b) 675,39 + 342,14. 563,87 + 403,13 - 328,35
2/5 +3/4=23/20 7/12 - 2/7 +1/12=32/84 12/17 -5/17 - 4/17=3/17
675,39 + 342,14=1017,54 563,87 + 203,13 - 328,35 =438,65
a) 2/5 + 3/4 7/12 - 2/7+1/12 12/17-5/17-4/17
b) 675,39+ 342,14 563,87 + 403,13 - 328,35
a) 2/5 + 3/4 =8/20 + 15/20 = 23/20
7/12 - 2/7 + 1/12 = (7/12 + 1/12) - 2/7 = 8/12 - 2/7 = 2/3 - 2/7 = 14/21 - 6/21 =8/21
12/17 - 5/17 - 4/17 = 7/17 - 4/17 = 3/17
b) 675,39 + 342,14 = 1017,53
563,87 + 403,13 - 328,35 = 967 - 328,35 = 638,65
Chúc bạn học tốt
6.Tính
a, 2/5 + 3/4
7/12 - 2/7 + 1/12
12/17-5/17-4/17
b, 675,39 +342,14
563,87 +403,13 -328,35
mn làm cả cách làm đầy đủ nha.Rồi mình sẽ tick cho nhoa.Cảm ơn
ví dụ 7/2 có nghĩa là 7 phần 12 nha
a,\(\frac{2}{5}+\frac{3}{4}=\frac{8+15}{20}=\frac{23}{20}\)
\(\frac{7}{12}-\frac{2}{7}+\frac{1}{12}=(\frac{7}{12}+\frac{1}{12})-\frac{2}{7}\)
\(=\frac{2}{3}-\frac{2}{7}=\frac{14-6}{21}=\frac{8}{21}\)
\(\frac{12}{17}-\frac{5}{17}-\frac{4}{17}=\frac{7}{17}-\frac{4}{17}=\frac{3}{17}\)
b,\(675,39+342,14=1017,53\)
\(563,87+403,13-328,35=638,65\)
2/5+3/4=23/20
7/12-2/7+1/12=8/21
12/17-5/17-4/173/17
675,39+342,14=1017,53
563,87+403,13-328,35=638,65
tính
2/5 + 3/4 7/12 - 2/7 + 1/12 12/17 - 5/17 - 4/17
675,39 + 342,14 563,87 + 403,13 - 328,35
\(\frac{2}{5}+\frac{3}{4}=\frac{8}{20}+\frac{15}{20}=\frac{23}{20}\)
\(\frac{7}{12}-\frac{2}{7}+\frac{1}{12}=\left(\frac{7}{12}+\frac{1}{12}\right)-\frac{2}{7}=\frac{2}{3}-\frac{2}{7}=\frac{8}{21}\)
\(\frac{12}{17}-\frac{5}{17}-\frac{4}{17}=\frac{12-5-4}{17}=\frac{3}{17}\)
\(675,39+342,14=1017,53\)
\(563,87+403,13-328,35=638,65\)
~Học tốt~
TÍNH :
a, 2/5 + 3/4 ; 7/12 - 2/7 + 1/12 ; 12/17 - 5/17 - 4/17
b, 675,39 + 342,14 ; 563,87 + 403,13 - 328,35
help~
1.Tính:
a)889972+96306 b)726,83-349,67
c)\(\frac{7}{8}+\frac{3}{4}\) d)\(2-\frac{5}{6}\)
2.Tính:
a)\(\frac{2}{5}+\frac{3}{4};\frac{7}{12}-\frac{2}{7}+\frac{1}{12};\frac{12}{17}-\frac{5}{17}-\frac{4}{17}.\)
b)\(675,39+342,14;563,87+403,13-328,35.\)
Giúp mình với !!!!!
1.
a) 889972 + 96306 = 986278
b) 726,83 - 349,67 = 377,16
c) \(\frac{7}{8}+\frac{3}{4}=\frac{13}{8}\)
d)\(2-\frac{5}{6}=\frac{7}{6}\)
tính :
a) 2/5 + 3/4 = 7/12 - 2/7 + 1/12 = 12/17 - 5/17 - 4/17
b) 675,39 + 342,14 = 563 , 87 + 403 , 13 =
a) \(\frac{2}{3}+\frac{3}{4}=\frac{8}{12}+\frac{9}{12}=\frac{17}{12}\)
\(\frac{7}{12}-\frac{2}{7}+\frac{1}{12}=\frac{7}{12}+\left(-\frac{2}{7}\right)+\frac{1}{12}=\frac{7}{12}+\frac{1}{12}+\left(-\frac{2}{7}\right)=\frac{8}{12}+\left(-\frac{2}{7}\right)=\frac{2}{3}+\left(-\frac{2}{7}\right)=-\left(\frac{14}{21}+\frac{6}{21}\right)=-\frac{20}{21}\)
\(\frac{12}{17}-\frac{5}{17}-\frac{4}{17}=\frac{12-5-4}{17}=\frac{3}{17}\)
b) 675,39 + 342,14 = 1017,53
563,87 + 403,13 = 967
a]2/3+3/4=8/12+9/12=17/12
7/12-2/7+1/12=49/84-24/84+7/84=25/84+7/84=32/84=8/21
12/17-5/17-4/7=7/17-4/17=3/17
b]675,39+342,14=999,53
563,87+403,13=967
1.Tính
2/3+3/5 7/12-2/7+1/12 12/17-5/17-4/17
2.Tính
7/9 x 3/35 9/22 x 55 11/17: 33/34
nhanh nha cần gấp
Câu 2:
\(\dfrac{7}{9}\cdot\dfrac{3}{35}=\dfrac{1}{5}\cdot\dfrac{1}{3}=\dfrac{1}{15}\)
\(\dfrac{9}{22}\cdot55=\dfrac{9\cdot55}{22}=\dfrac{9\cdot5}{2}=\dfrac{45}{2}\)