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“考考你”下面各题怎么算简便就怎么算?710×101-71089×89÷89×8935×99
问题详情
“考考你”下面各题怎么算简便就怎么算?
参考答案
(1)710×101-710,
=710×(101-1),
=710×100,
=70;
(2)89×89÷89×89,
=89×89×98×89,
=(89×89)×(98×89),
=6481×1,
=6481;
(3)35×99+35,
=35×(99+1),
=35×100,
=60;
(4)(47+89)×225,
=9263×225,
=1841575;
(5)1521×34+1021×34-34,
=(1521+1021-1)×34,
=421×34,
=17;
(6)345×25,
=(3+45)×25,
=3×25+45×25,
=75+20,
=95;
(7)36×3435,
=(35+1)×3435,
=35×3435+1×3435,
=34+3435,
=343435;
(8)(56-59)×185,
=56×185-59×185,
=3-2,
=1.
考点: