题目内容

完成下列算式。
1. ten - four = __________ .  2. one + seven = ___________.
3. seven - three = __________.  4. eight + two = __________.
5. nine - four = __________ .  6. six + one = ___________ .
7. four - two = __________ .  8. ten - seven = __________.
9.five + four = _________ .  10. three - two = ___________ .
1. six        2. eight  3. four   4. ten     5. five  
6. seven  7. two    8. three  9. nine  10. one
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