题目内容
简便做法.
| 1.25×4×8×2.5 | 5.4×5.4+3.6×5.4+5.4 | 425×1.6-25×1.6 | 25×32×125. |
(1)1.25×4×8×2.5,
=(1.25×8)×(4×2.5),
=10×10,
=100;
(2)5.4×5.4+3.6×5.4+5.4,
=5.4×(5.4+3.6+1),
=5.4×10,
=54;
(3)425×1.6-25×1.6,
=(425-25)×1.6,
=400×1.6,
=640;
(4)25×32×125,
=25×4×8×125,
=(25×4)×(8×125),
=100×1000,
=100000.
=(1.25×8)×(4×2.5),
=10×10,
=100;
(2)5.4×5.4+3.6×5.4+5.4,
=5.4×(5.4+3.6+1),
=5.4×10,
=54;
(3)425×1.6-25×1.6,
=(425-25)×1.6,
=400×1.6,
=640;
(4)25×32×125,
=25×4×8×125,
=(25×4)×(8×125),
=100×1000,
=100000.
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