计算下面各题,能用简便方法的用简便方法计算. 1800÷[(15+10)×3] 4×8×25×125 64×125
计算下面各题,能用简便方法的用简便方法计算.1800÷[(15+10)×3]4×8×25×12564×125265×105-265×599+99×9941×25....
计算下面各题,能用简便方法的用简便方法计算. 1800÷[(15+10)×3] 4×8×25×125 64×125 265×105-265×5 99+99×99 41×25.
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(1)1800÷[(15+10)×3],告枣
=1800÷[25×3]
=1800÷75,
=24;
(2)4×8×25×125,
=(4×25)×(8×125),
=100×1000,
=100000;
(3)64×125,
=8×8×125,
=8×(8×125),
=8×1000,
=8000;
(4)穗颤265×105-265×5,
=265×(105-5),
=265×100,
=26500;
(5)99+99×99,
=(1+99)×99,
=100×99,
=9900;
(6)41×25,
=(40+1)×25,
=40×25+1×25,猜友败
=1000+25,
=1025.
=1800÷[25×3]
=1800÷75,
=24;
(2)4×8×25×125,
=(4×25)×(8×125),
=100×1000,
=100000;
(3)64×125,
=8×8×125,
=8×(8×125),
=8×1000,
=8000;
(4)穗颤265×105-265×5,
=265×(105-5),
=265×100,
=26500;
(5)99+99×99,
=(1+99)×99,
=100×99,
=9900;
(6)41×25,
=(40+1)×25,
=40×25+1×25,猜友败
=1000+25,
=1025.
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