问题
解答题
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答案
(1)56×99,
=56×(100-1),
=56×100-56×1,
=5600-56,
=5544;
(2)0.7+3.9+4.3+6.1,
=(0.7+4.3)+(3.9+4.1),
=5+8,
=13;
(3)95.6×18+4.4×18,
=(95.6+4.4)×18,
=100×18,
=1800.
|
(1)56×99,
=56×(100-1),
=56×100-56×1,
=5600-56,
=5544;
(2)0.7+3.9+4.3+6.1,
=(0.7+4.3)+(3.9+4.1),
=5+8,
=13;
(3)95.6×18+4.4×18,
=(95.6+4.4)×18,
=100×18,
=1800.