试题:
递等式计算(能简算的要简算).
(1)191.3-47.2+96.9
(2)9.63+13.78-3.63
(3)50.03-6.5-0.5
(4)25×125×16
(5)2506-506×3+27
(6)99×63+63.

答案:

我来补答

(1)191.3-47.2+96.9,
=144.1+96.9,
=241;

(2)9.63+13.78-3.63,
=9.63-3.63+13.78,
=6+13.78,
=19.78;

(3)50.03-6.5-0.5,
=50.03-(6.5+0.5),
=50.03-7,
=43.03;

(4)25×125×16,
=25×125×(2×8),
=(25×2)×(125×8),
=50×1000,
=50000;

(5)2506-506×3+27,
=2506-1518+27,
=988+27,
=1015;

(6)99×63+63,
=(99+1)×63,
=100×63,
=6300.
 
 
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