tính bằng hai cách
9/7 : 17/14 + 8/7 : 17/14 (0,9 + 1.05 ) : 0.25
tính bằng hai cách
9/5:17/15+8/5:17/15.....
0.9:0.25+1.05:0.25........
9/5 : 17/15 + 8/5 : 17/15
= 27/17 + 24/17
= 3
cách 2
( 9/5 + 8/5 ) : 17/15
=17/5 : 17/15
= 3
0,9 : 0,25 + 1,05 : 0,25
= 3,6 + 4,2
= 7,8
cách 2
0,9 : 0,25 + 1,05 : 0,25
= ( 0,9 + 1,05 ) : 0,25
= 1,95 : 0,25
= 7,8
Tinh bang hai cach
9/5:17/15+8/5:17/15
0,9:0.25+1.05:0.25
cách 1: 9/5:17/15 + 8/5:17/15=27/17+24/17=3
cách 2 :9/5:17/15+8/5:17/15=17/15 x15/17+8/5 x15/17=15/17 x (9/5+8/5)=15/17 x 17/5 = 3
tính bằng hai cách
a) 9/5 chia 17/5 +8/5 chia 17/15=
b) 0.9 chia 0.25 + 1.05 chia 0.25 =
Tính bằng 2 cách :
a) 9/5 : 17/15 + 8/5 : 17/15
b)0.9 : 0.25 + 1.05 : 0.25
Làm giúp mình nhé
a)
C1: 9/5 : 17/15 + 8/5 : 17/15
= 27/17 + 14/17
= 3
C2: 9/5 : 17/15 + 8/5 : 17/15
= ( 9/5 + 8/5 ) : 17/15
= 17/5 : 17/15
= 3
b)
C1: 0,9 : 0,25 + 1.05 : 0,25
= 3,6 + 4,2
= 7,8
C2: 0,9 : 0,25 + 1,05 : 0,25
= ( 0,9 + 1,05) : 0,25
= 1,95 : 0,25
= 7,8
tính bằng 2 cách
9/5:17/15+8/5:17/15
0.9:0.25+1.05:0.25
tính bằng hai cách
a) 9/5 chia + 8/5 chia 17/15 =
b) 0,9 chia 0,25+1,05 chia 0.25=
Tính bằng hai cách
A. 17/19 *12/15 *19/17
B. (5/7+9/7)*21/28
C. 4/5*13/14+13/14*1/5
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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 \(\dfrac{19}{17}\)
= \(\dfrac{4}{5}\)
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 \(\dfrac{12}{15}\)
= \(\dfrac{4}{5}\)
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 \(\dfrac{21}{28}\)
= \(\dfrac{15}{28}\) + \(\dfrac{27}{28}\)
= \(\dfrac{42}{28}\)
= \(\dfrac{3}{2}\)
Tính bằng hai cách
A. 17/19 * 12/15 * 19/17
B. (5/7 + 9/7)*21/28
C. 4/5 * 13/14 + 13/14 * 1/5