Question

Tính : 3 - 4 + 5 - 6 + 7 - 8 + 9 ( yêu cầu các bạn giải theo cách lớp 2 )

Answer 1

\(3-4+5-6+7-8+9\)

\(=\left(3+7\right)-\left(4+6\right)+\left(5+9-8\right)\)

\(=10-10+6\)

\(=6\)

Answer 2

=3+5+7+9 - 4-6-8

=24-4-6-8

=20-6-8

=14-8

=6

Answer 3

\(3-4+5-6+7-8+9\)

\(=\left(3+7\right)-\left(4+6\right)+\left(5+9-8\right)\)

\(=10-10+6\)

\(=6\)

Code : Breacker

Answer 4

3-4+5-6+7-8+9

=(3+7)-(4+6)+(5+9-8)

=10-10+6

=6

hok tốt !!! 

#^_^

Answer 5

3 - 4 + 5 - 6 + 7 - 8 + 9 

= ( 3 + 5 + 7 + 9 ) - ( 4 + 6 + 8 )

= 24 - 18 

= 6

Answer 6

\(\text{Tính : }\)

      \(3-4+5-6+7-8+9\)

\(=\left(3+7\right)-\left(4+6\right)+\left(5+9-8\right)\)

\(=10-10+6\)

\(=0+6\)

\(=6\)

Answer 7

3-4\(+\)5-6\(+\)7-8\(+\)9=\((\)3\(+\)5\(+\)7\(+\)9\()\)-4-6-8

=24-4-6-8=20-6-8=14-8=6

Answer 8

3-4+5-6+7-8+9

=(3+7)-(4+6)+(5+9-8)

=10-10+6

=6

Answer 9

3 - 4 + 5 - 6 + 7 - 8 + 9

= ( 3 + 7 ) - ( 4 + 6 ) + ( 5 + 9 - 8 )

= 10 - 10 + 6

= 0 + 6

=6