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Test: Adding and subtracting 9 digits

1)
3−8+1−3−1−7+1−4−2＝
2)
8+9+1−7+3+1−1−2−7＝
3)
5+3+7+9−3−5+7+1−3＝
4)
2+7−9−8−5−4−9−9−4＝
5)
4−7−9+4+5−6+6+9+2＝
6)
5−8−8+5−3−2+4−7+1＝
7)
5+4−5+8−9−8−6+9+3＝
8)
9−9+4−4+9−1−3+3+7＝
9)
2+2+3−2−4+4+7+8+6＝
10)
1+3−5−3−4+9−4+9−7＝
Well:Wrong:Mistakes:

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