50-51+40-41+30-31+60
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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\text{50-51+40-41+30-31+60}\)
\(\text{=(50+40+30+60)+(−51−41−31)}\)
\(\text{=180−123}\)
\(\text{=57}\)
chúc bạn học tốt
![](https://rs.olm.vn/images/avt/0.png?1311)
{70-61}+{60-51}+{50-41}+{40-31}+{30-21}+{20-11}+10=9+9+9+9+9+9+10=64
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
50 - 51 + 40 -41 + 30 -31 + 60
= ( 50 - 41 ) + ( 40 - 31 ) +( 60 - 51 ) + 30
= 9 + 9 + 9 + 30
= 9 x 4 + 30
= 36 + 30
= 66
Hok tốt !!
![](https://rs.olm.vn/images/avt/0.png?1311)
50-51+40-41+30-31+60
=-1+(-1)+(-1)+60
=-3+60
=57
![](https://rs.olm.vn/images/avt/0.png?1311)
= (70 - 60) + (61 - 51) + (50 - 40) + (41 - 31) + ( 30 - 20) + (21 - 11) + 10
= 10 +10 + 10 + 10 + 10 + 10 + 10.
= 20 + 20 + 20 + 10
= 40 + 30
= 70
![](https://rs.olm.vn/images/avt/0.png?1311)
= ( 60+40) +( 61-11 +50) + (51 + 70 -21) + ( 41 -31 +30 +10 +20)
= 100 + 100 + 100 + 70
= 370
![](https://rs.olm.vn/images/avt/0.png?1311)
{70-61}+{60-51}+{50-41}+{40-31}+{30-21}+{20-11}+10
=9+9+9+9+9+9+10=64
![](https://rs.olm.vn/images/avt/0.png?1311)
60-61+50-51+40-41+30+31++20-21+10-11+70 = 64
Tích nha cho đủ 220 điểm
50 - 51 + 40 -41 + 30 - 31 + 60
= (60 - 51) + (50 - 41) + (40 - 31)+30
= 9 + 9 + 9 + 30
= 57
câu trả lời = 57