问题
解答题
72×45=9×8×5×9=(9×9)×(8×5)=81×40=3240______.(判断对错)
答案
72×45
=9×8×5×9
=(9×9)×(8×5)
=81×40
=3240.
故答案为:√.
72×45=9×8×5×9=(9×9)×(8×5)=81×40=3240______.(判断对错)
72×45
=9×8×5×9
=(9×9)×(8×5)
=81×40
=3240.
故答案为:√.