问题
解答题
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答案
①25×32×125,
=(25×4)×(8×125),
=100×1000,
=100000;
②45×55+55×55,
=(45+55)×55,
=100×55,
=5500;
③102×34,
=(100+2)×34,
=100×34+2×34,
=3400+68,
=3468;
④880÷16,
=880÷8÷2,
=110÷2,
=55;
⑤99×99,
=(100-1)×99,
=100×99-1×99,
=9900-99,
=9801;
⑥99×99+99,
=99×(99+1),
=99×100,
=9900;
⑦101×101-101,
=101×(101-1),
=101×100,
=10100;
⑧55×55+55+55×44,
=55×(55+45+1),
=55×100,
=5500.