问题
解答题
用你喜欢的方法进行计算
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答案
(1)101×99-99+100,
=(101-1)×99+100,
=100×99+100,
=9900+100,
=10000;
(2)3.14×52-3.14×42,
=3.14×(52-42),
=3.14×(25-16),
=3.14×9,
=28.26;
(3)75%×
+0.2×4 5
,3 4
=75%×(
+0.2),4 5
=75%×1,
=75%.