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a, (33164+ 28528):4 = 61692 : 4= 15423
C2: (33164+ 28528):4 = 33164 : 4 + 28528 : 4 = 8291 + 7132 = 15423
b, Bn lm tg tự nha
Cách 1:
( 33164 + 28528) :4
= 61692 : 4
= 1523
Cách 2:
1/4 ( 33164 + 28528)
= 1/4 x 33164 + 1/4 x 28528
= 8291 + 7132
= 15423
a, ( 426 + 813 ) : 3
Cách 1: Cách 2:
=1239:3 =426:3+813:3
=413 =142+271
=413
b, ( 2350 + 435 ) : 5
Cách 1: Cách 2:
=2785:5 =2350:5+435:5
=557 =470+87
=557
a,C1
(5/6 + 5/8) x 2/3
= 35/24 x 2/3
=35/36
C2
(5/6 + 5/8) x 2/3
= 5/6x2/3 + 5/8x2/3
= 10/18 + 10/24
= 35/36
b,C1
7/5 x 3/4 - 1/2 x 3/4
= 21/20 - 3/8
= 27/40
C2
7/5 x 3/4 - 1/2 x 3/4
=3/4 x (7/5-1/2)
=3/4x9/10
=27/40
a, 5/6 x (1/8x2/3)
=5/6 x 1/12
=5/72
b,(7/5 - 1/2) x 3/4
=0,9 x 3/4
=3,06
c,(5/6+5/8) x 2/3
=70/48 x 2/3
=35/36
a, 5/6 x (1/8x2/3)
=5/6 x 1/12
=5/72
b,(7/5 - 1/2) x 3/4
=0,9 x 3/4
=3,06
c,(5/6+5/8) x 2/3
=70/48 x 2/3
=35/36
a: =5/48+10/18=95/144
b: =3/4(7/5-1/2)=3/4x9/10=27/40
c: =2/3x35/24=70/72=35/36
a) C1
\(\dfrac{1}{8}\times\dfrac{5}{6}+\dfrac{5}{6}\times\dfrac{2}{3}=\dfrac{5}{6}\times\left(\dfrac{1}{8}+\dfrac{2}{3}\right)=\dfrac{5}{6}\times\dfrac{19}{24}=\dfrac{95}{144}\)
C2
\(\dfrac{1}{8}\times\dfrac{5}{6}+\dfrac{5}{6}\times\dfrac{2}{3}=\dfrac{5}{48}+\dfrac{10}{18}=\dfrac{95}{144}\)
b) C1
\(\dfrac{7}{5}\times\dfrac{3}{4}-\dfrac{1}{2}\times\dfrac{3}{4}=\dfrac{3}{4}\times\left(\dfrac{7}{5}-\dfrac{1}{2}\right)=\dfrac{3}{4}\times\dfrac{9}{10}=\dfrac{27}{40}\)
C2
\(\dfrac{7}{5}\times\dfrac{3}{4}-\dfrac{1}{2}\times\dfrac{3}{4}=\dfrac{21}{20}-\dfrac{3}{8}=\dfrac{27}{40}\)
c) C1
\(\left(\dfrac{5}{6}+\dfrac{5}{8}\right)\times\dfrac{2}{3}=\dfrac{35}{24}\times\dfrac{2}{3}=\dfrac{35}{36}\)
C2
\(\left(\dfrac{5}{6}+\dfrac{5}{8}\right)\times\dfrac{2}{3}=\left(\dfrac{5}{6}\times\dfrac{2}{3}\right)+\left(\dfrac{5}{8}\times\dfrac{2}{3}\right)=\dfrac{5}{9}+\dfrac{5}{12}=\dfrac{35}{36}\)
Cách 2: (33164 + 28528) : 4 = 33164 : 4 + 28528 : 4 = 8291 + 7132 = 15423
b) (403494 - 16415) : 7 = ?
Cách 1: (403494 - 16415) : 7 = 387079 : 7 = 55297
Cách 2: (403494 - 16415) : 7 = 403494 : 7 - 16415 : 7 = 57642 - 2345 = 55297
tham khảo
a) (33164 + 28528) : 4 =
Cách 1: (33164 + 28528) : 4
= 61692 : 4
= 15423
Cách 2: (33164 + 28528) : 4
= 33164 : 4 + 28528 : 4
= 8291 + 7132
= 15423
b) (403494 - 16415) : 7 =
Cách 1: (403494 - 16415) : 7
= 387079 : 7
= 55297 Cách 2: (403494 - 16415) : 7
= 403494 : 7 - 16415 : 7
= 57642 - 2345
= 55297