6. 44 + 22 = _________________
= _________ = ________
7. 30 + 24 = _________________
= _________ = ________
8. 28 + 41 = _________________
= _________ = ________
9. 33 + 26 = _________________
= _________ = ________
10. 17 + 51 = _________________
= _________ = ________
วิธีที่ 3 การบวกวิธลัด
ี