______Quistion______

1. 66-66=

2.50-40=

3.6-1=

4.77+3=

5.12-6=

_____Answer______

1. 0
2. 10
3. 5
4. 80
5. 6

_____Solotion______

1. =66−66

=66+−66

= 0

2. =50−40

=50+−40

=10

3. =6−1

=6+−1

=5

4. 80

5. =12−6

=12+−6

=6

_____________

i hope it help

carry on learning