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

2024-11-22 13:47:58
推荐回答(1个)
回答(1):

(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.