( 2 + 2/3 - 1/4 ) * 1/5
= ( 6/ 3 + 2/3 - 1/4 ) * 1/5
= ( 8/3 - 1/4 ) * 1/5
= ( 32/12 - 3/ 12 ) * 1/5
= 29 / 12 * 1/5
=29/60
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Các câu hỏi tương tự
khoanh vào hỗn số :
1_ 2/3 ; 2_1/3 ; 1- 2/3 ; 2 nhân 1/3 ; 3:1/4 ;
2_7/10 lít ; 3_1/5kg ; 4_5/3m ; 2_6/3km
Tính Nhanh
a) ( 1/2 + 1/3 + 1/4 + 1/5 + 1/6 ) - ( 1/2 + 1/3 + 1/4 + 1/5 )
b) ( 2/3 + 2/4 + 2/5 + 2/6 + 2/7 ) - ( 2/4 + 2/5 + 2/6 + 2/7 + 28 )
bài 1:
1/4 + 2/3 2/7 + 2/3 2/5 + 1/3 2/3 + 1/2 1/3 + 3/5 4/5 + 1/3
1/8 + 3/4 1/36 + 5/12 1/3 + 1/6 + 1/18.
bài 2:
15/16 - 3/16 17/18 - 5/6 3/4 - 4/9 1/2 - 2/5 5/6 - 3/10 3-1/3
4/5 - 1/10 5/2 - 1 5/8 - 2/5.
1/2+{1/3+2/3}+{1/4+2/4+3/4}+1/5+2/5+3/5+4/5}
Bài 2:
a) ( 1/4 :5 x 1/3 x 1/4 ) : ( 2/3 + 1/5 :4 )
b) ( 3/4 :5 + 1/2:3/5 ) x ( 4/5 + 1/3 x2 )
tính
5-13/17
2/5-1/7
4/9-2/9
5/4-1/3
5/2-1/4-2/3
4/3-2/5+1/2
2/5+2/3+3/4
2/6+3/12
5/6+1/3
1/3+5/12+5/6
5/8+4/7
1/5+5/35
5/8+3/4
1/6+1/3+1/12
1/6+5/24+2/3
7/3+8/7
2/5+1/6
1/7+1/4+6/7+3/4
giúp với
và ai giải được gọi cụ
1) 1/3 x 1/2 x 3/7 2) 5/4 x 1/3 + 1/7 3) 8 x ( 8/9-2/3 ) 4) 5/6 x 48/20 x 1/2 5) ( 2/5 + 3/4 ) x 8 6) 10 x ( 1/2-1/5 )
3/5+4/5*2/5 9/16*4/3+1/2: 3/4 1/2*1/4*1/6 1/4: 1/3-4/2