Tính a.4/11+ -5/13+7/11- 8/13 +1/2 b.1/3-2/3÷4/3 c.1/4-(3/8+ 1/4+5/2)÷2/3 07/08/2021 Bởi Everleigh Tính a.4/11+ -5/13+7/11- 8/13 +1/2 b.1/3-2/3÷4/3 c.1/4-(3/8+ 1/4+5/2)÷2/3
a, 4/11+ -5/13+7/11- 8/13 +1/2 =4/11+7/11+-5/13-8/13 +1/2 = 1+(-1) +1/2 =1/2 b, 1/3-2/3÷4/3 =1/3-1/2 =-1/6 c,1/4−(3/8+1/4+5/2):2/3 =1/4−(3/8+2/8+20/8)×3/2 =1/4−25/8×3/2 =1/4−75/16 =4/16−75/16 =−71/16 Bình luận
Đáp án: a,`4/11 – 5/13 + 7/11 -8/13 + 1/2` `=(4/11 + 7/11) -(5/13 + 8/13) +1/2` `=1-1 +1/2=1/2` b, `1/3 – 2/3 : 4/3` `=1/3 – 2/3 xx 3/4` `=1/3 – 1/2 ` `=2/6-3/6=-1/6` c,`1/4 -(3/8 + 1/4 + 5/2) : 2/3` `=1/4 – (3/8 + 2/8 + 20/8) xx 3/2` `=1/4 – 25/8 xx 3/2` `=1/4 – 75/16` `=4/16-75/16` `=-71/16` XIN HAY NHẤT NHA Main Bình luận
a, 4/11+ -5/13+7/11- 8/13 +1/2
=4/11+7/11+-5/13-8/13 +1/2
= 1+(-1) +1/2
=1/2
b, 1/3-2/3÷4/3
=1/3-1/2
=-1/6
c,1/4−(3/8+1/4+5/2):2/3
=1/4−(3/8+2/8+20/8)×3/2
=1/4−25/8×3/2
=1/4−75/16
=4/16−75/16
=−71/16
Đáp án:
a,`4/11 – 5/13 + 7/11 -8/13 + 1/2`
`=(4/11 + 7/11) -(5/13 + 8/13) +1/2`
`=1-1 +1/2=1/2`
b, `1/3 – 2/3 : 4/3`
`=1/3 – 2/3 xx 3/4`
`=1/3 – 1/2 `
`=2/6-3/6=-1/6`
c,`1/4 -(3/8 + 1/4 + 5/2) : 2/3`
`=1/4 – (3/8 + 2/8 + 20/8) xx 3/2`
`=1/4 – 25/8 xx 3/2`
`=1/4 – 75/16`
`=4/16-75/16`
`=-71/16`
XIN HAY NHẤT NHA
Main