Tính bằng 2 cách 5/24×5/12×24 ; (1/4+2/3)x4/5 ; 3/7×16/33+16/33×4/7 em cho 20đ nếu đúng 21/11/2021 Bởi Audrey Tính bằng 2 cách 5/24×5/12×24 ; (1/4+2/3)x4/5 ; 3/7×16/33+16/33×4/7 em cho 20đ nếu đúng
Đáp án: Cách 1 : a)5/24 x 5/12 x 24= 25/(24×12) x 24 = 25/12 b)(1/4+2/3)x4/5=11/12 x 4/5 =11/15 c)3/7×16/33+16/33×4/7=16/77+64/231 =16/33 Cách 2: a)5/24×5/12×24=(5/24 x 24) x 5/12 =5×5/12=25/12 b)(1/4+2/3)x4/5=1/4×4/5+2/3×4/5 =1/5+8/15=11/15 c)3/7×16/33+16/33×4/7=16/33x(3/7+4/7) =16/33 x 1 = 16/33 Chúc bạn học tốt Bình luận
Đáp án: Giải thích các bước giải: cách 1 a)5/24 x 5/12 x 24= 25/(24×12) x 24 = 25/12 b)(1/4+2/3)x4/5=11/12 x 4/5 =11/15 c)3/7×16/33+16/33×4/7=16/77+64/231 =16/33 cách 2 a)5/24×5/12×24=(5/24 x 24) x 5/12 =5×5/12=25/12 b)(1/4+2/3)x4/5=1/4×4/5+2/3×4/5 =1/5+8/15=11/15 c)3/7×16/33+16/33×4/7=16/33x(3/7+4/7) =16/33 x 1 = 16/33 Bình luận
Đáp án:
Cách 1 :
a)5/24 x 5/12 x 24= 25/(24×12) x 24
= 25/12
b)(1/4+2/3)x4/5=11/12 x 4/5
=11/15
c)3/7×16/33+16/33×4/7=16/77+64/231
=16/33
Cách 2:
a)5/24×5/12×24=(5/24 x 24) x 5/12
=5×5/12=25/12
b)(1/4+2/3)x4/5=1/4×4/5+2/3×4/5
=1/5+8/15=11/15
c)3/7×16/33+16/33×4/7=16/33x(3/7+4/7)
=16/33 x 1 = 16/33
Chúc bạn học tốt
Đáp án:
Giải thích các bước giải:
cách 1
a)5/24 x 5/12 x 24= 25/(24×12) x 24
= 25/12
b)(1/4+2/3)x4/5=11/12 x 4/5
=11/15
c)3/7×16/33+16/33×4/7=16/77+64/231
=16/33
cách 2
a)5/24×5/12×24=(5/24 x 24) x 5/12
=5×5/12=25/12
b)(1/4+2/3)x4/5=1/4×4/5+2/3×4/5
=1/5+8/15=11/15
c)3/7×16/33+16/33×4/7=16/33x(3/7+4/7)
=16/33 x 1 = 16/33