( 2/3 x 4/5) x 5/6 ( 1/2 + 1/3) x 1/5 Tính bằng hai cách 25/11/2021 Bởi Gabriella ( 2/3 x 4/5) x 5/6 ( 1/2 + 1/3) x 1/5 Tính bằng hai cách
Cách 1 ( 2/3 x 4/5) x 5/6 = 8/15 x 5/6 = 4/9 Cách 2 ( 2/3 x 4/5) x 5/6 = 2/3 x (4/5 x 5/6) = 2/3 x 4/6 = 4/9 Cách 1 ( 1/2 + 1/3) x 1/5 = 5/6 x 1/5 = 1/6 Cách 2 ( 1/2 + 1/3) x 1/5 = 1/2 x 1/5+1/3 x 1/5 = 1/10 + 1/15 = 1/6 CHÚC BẠN HỌC TỐT Bình luận
Cách 1: `(2/3×4/5)×5/6=8/15×5/6=(8×5)/(15×6)=(2×2×2×5)/(3×5×2×3)=4/9` Cách 2: `(2/3×4/5)×5/6=2/3×(4/5 ×5/6)=2/3×4/6=(2×4)/(3×6)=(2×4)/(3×2×3)=4/9` Cách 1: `(1/2+1/3)×1/5=((3+2)/6)×1/5=5/6×1/5=1/6` Cách 2: `(1/2+1/3)×1/5=1/2×1/5+1/3×1/5=1/10+1/15=3/30+2/30=5/30=1/6` Bình luận
Cách 1
( 2/3 x 4/5) x 5/6
= 8/15 x 5/6
= 4/9
Cách 2
( 2/3 x 4/5) x 5/6
= 2/3 x (4/5 x 5/6)
= 2/3 x 4/6
= 4/9
Cách 1
( 1/2 + 1/3) x 1/5
= 5/6 x 1/5
= 1/6
Cách 2
( 1/2 + 1/3) x 1/5
= 1/2 x 1/5+1/3 x 1/5
= 1/10 + 1/15
= 1/6
CHÚC BẠN HỌC TỐT
Cách 1:
`(2/3×4/5)×5/6=8/15×5/6=(8×5)/(15×6)=(2×2×2×5)/(3×5×2×3)=4/9`
Cách 2:
`(2/3×4/5)×5/6=2/3×(4/5 ×5/6)=2/3×4/6=(2×4)/(3×6)=(2×4)/(3×2×3)=4/9`
Cách 1:
`(1/2+1/3)×1/5=((3+2)/6)×1/5=5/6×1/5=1/6`
Cách 2:
`(1/2+1/3)×1/5=1/2×1/5+1/3×1/5=1/10+1/15=3/30+2/30=5/30=1/6`