题目内容
| 怎样简便怎样算. 5.78+0.54+4.22 | 17.65-(2.98+5.65) | 65+99×65 |
| 50×125×16 | 98×45 | 540÷45. |
(1)5.78+0.54+4.22,
=5.78+4.22+0.54,
=10+0.54,
=10.54;
(2)17.65-(2.98+5.65),
=17.65-2.98-5.65,
=17.65-5.65-2.98,
=12-2.98,
=9.02;
(3)65+99×65,
=65×(99+1),
=65×100,
=6500;
(4)50×125×16,
=50×125×2×8,
=(50×2)×(125×8),
=100×1000,
=100000;
(5)98×45,
=(100-2)×45,
=100×45-2×45,
=4500-90,
=4410;
(6)540÷45,
=(540÷9)÷(45÷9),
=60÷5,
=12.
=5.78+4.22+0.54,
=10+0.54,
=10.54;
(2)17.65-(2.98+5.65),
=17.65-2.98-5.65,
=17.65-5.65-2.98,
=12-2.98,
=9.02;
(3)65+99×65,
=65×(99+1),
=65×100,
=6500;
(4)50×125×16,
=50×125×2×8,
=(50×2)×(125×8),
=100×1000,
=100000;
(5)98×45,
=(100-2)×45,
=100×45-2×45,
=4500-90,
=4410;
(6)540÷45,
=(540÷9)÷(45÷9),
=60÷5,
=12.
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