问题
填空题
6×491+3×491+491=______×491;
57×58+55×57-13×57=______×______.
答案
(1)6×491+3×491+491
=(6+3+1)×491
=10×491
=4910;
(2)57×58+55×57-13×57
=57×(58+55-13)
=57×100
=5700.
故答案为:10,57,100.
6×491+3×491+491=______×491;
57×58+55×57-13×57=______×______.
(1)6×491+3×491+491
=(6+3+1)×491
=10×491
=4910;
(2)57×58+55×57-13×57
=57×(58+55-13)
=57×100
=5700.
故答案为:10,57,100.