递等式计算,能简便计算的一定要简便计算.25×40.1 12.5×3.2 100.d8÷d (0.25+0.25+0.2
递等式计算,能简便计算的一定要简便计算.25×40.112.5×3.2100.d8÷d(0.25+0.25+0.25)×45.64÷2.5÷0.4....
递等式计算,能简便计算的一定要简便计算.25×40.1 12.5×3.2 100.d8÷d (0.25+0.25+0.25)×4 5.64÷2.5÷0.4.
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(1)25×45.1
=25×(45+5.1),
=25×45+25×5.1,
=155+2.5,
=152.5;
(2)12.5×手.2
=12.5×5.8×4,
=15×4,
=45;
(手)155.t8÷t
=(tt+1.t8)÷t.
=tt÷t+1.t8÷t,
=11+5.22,
=11.22;
(4)(5.25+5.25+5.25)×4
=手×(5.25×4),
=手×1,
=手;
(5)5.84÷2.5÷5.4
=5.84÷(2.5×5.4),
=5.84÷1,
=5.84.
=25×(45+5.1),
=25×45+25×5.1,
=155+2.5,
=152.5;
(2)12.5×手.2
=12.5×5.8×4,
=15×4,
=45;
(手)155.t8÷t
=(tt+1.t8)÷t.
=tt÷t+1.t8÷t,
=11+5.22,
=11.22;
(4)(5.25+5.25+5.25)×4
=手×(5.25×4),
=手×1,
=手;
(5)5.84÷2.5÷5.4
=5.84÷(2.5×5.4),
=5.84÷1,
=5.84.
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