问题
解答题
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答案
(1)8+2-8+2,
=10-8+2,
=2+2,
=4;
(2)25×4÷25×4,
=100÷25×4,
=4×4,
=16;
(3)
×5÷1 5
×5,1 5
=1÷
×5,1 5
=5×5,
=25;
(4)26-0.75+0.25,
=25.25+0.25,
=25.5;
(5)7.26-(5.26-1.5),
=7.26-5.26+1.5,
=22+1.5,
=23.5;
(6)286+198,
=286+200-2,
=486-2,
=484;
(7)314-202,
=314-200-2,
=114-2,
=112;
(8)526+301,
=526+300+1,
=826+1,
=827;
(9)223-99,
=223-100+1,
=123+1,
=124;
(10)6.25+3.85-2.125+3.875,
=10.1-2.125+3.875,
=7.975+3.875,
=11.85;
(11)9-24÷56×21,
=9-
×21,3 7
=9-9,
=0;
(12)98×58+58+58,
=(98+1+1)×58,
=100×58,
=5800.