a, ( \(\frac{7}{9}\)+ \(\frac{11}{3}\)) - \(\frac{5}{3}\)= \(\frac{40}{9}\)- \(\frac{5}{3}\)
= \(\frac{25}{9}\)
b, ( \(\frac{1}{3}\)+ \(\frac{9}{7}\)) - \(\frac{8}{7}\)= \(\frac{34}{21}\)- \(\frac{8}{7}\)
= \(\frac{10}{21}\)
a, ( \(\frac{7}{9}\)+ \(\frac{11}{3}\)) - \(\frac{5}{3}\)= \(\frac{40}{9}\)- \(\frac{5}{3}\)
= \(\frac{25}{9}\)
b, ( \(\frac{1}{3}\)+ \(\frac{9}{7}\)) - \(\frac{8}{7}\)= \(\frac{34}{21}\)- \(\frac{8}{7}\)
= \(\frac{10}{21}\)
2. Tính bằng hai cách: A) ( 7/9 + 3/5 ) x 2/3. B) ( 9/11 - 3/11 ) x 5/7. C) 7/8 x ( 8/9 - 1/3 ).
2. Tính bằng hai cách: A) ( 7/9 + 3/5 ) x 2/3. B) ( 9/11 - 3/11 ) x 5/7. C) 7/8 x ( 8/9 - 1/3 ).
Tính bằng hai cách
a) ( 6 / 11 + 5 / 11 ) x 3 / 7
b) 3 / 5 x 7 / 9 - 3 / 5 x 2 / 9
c) ( 6 / 7 - 4 / 7 ) : 2 / 5
d) 8 / 15 : 2 / 11 + 7 / 15 : 2 / 11
Tính bằng 2 cách
A . (7/9 + 11/3) -5/3
B. (1/3 + 9/7) -8/7
Tính bằng 2 cách.
A, (6/11 +5/11)* 3/7
B, 3/5 * 7/9 + 3/5 * 2/9
C, ( 6/7 - 4/7 ) : 2/5
D, 8/15 : 2/11 + 7/15 : 2/11
tính bằng 2 cách:
a 3/5*7/9-3/5*2/9
b 8/15:2/11+7/5:2/11
c [6/7-4/7]:2/5
Tính bằng 2 cách:
a, ( 6/11 + 5/11 ) x 3/17
b, 3/5 x 7/9 - 3/5 x 2/9
c, ( 6/7 - 4/7 ) : 2/5
d, 8/15 : 2/11 + 7/15 : 2/11
Bài 1 : Tính bằng hai cách
a) ( 6/11 + 5/11 ) x 3/7 =
b) 3/5 x 7/9 - 3/5 x 2/9 =
c) ( 6/7 - 4/7 ) : 2/5 =
d) 8/15 : 2/11 + 7/15 : 2/11 =
Bài 2 : Tính
a) 2 x 3 x4/3 x 4 x 5 =
b) 2/3 x 3/4 x 4/5 : 1/5 =
c) 1 x 2 x 3 x 4 / 5 x 6 x 7 x8 =
d) 2/5 x 3/4 x 5/6 : 3/4 =
Tính bằng hai cách :
a) (7/11 + 5/9) x 2
b) (2/3 + 7/9) :2