70.08-1.25-1.754.6+2.89+5.4+3

发布时间:2020-08-13 11:29:20

70.08-1.25-1.75         4.6+2.89+5.4+3.1122×10145×36+54×36+36           25×(4×27)85×99+85.

网友回答

解:(1)70.08-1.25-1.75,
=70.08-(1.25+1.75),
=70.08-3,
=67.08;

(2)4.6+2.89+5.4+3.11,
=(4.6+5.4)+(2.89+3.11),
=10+6,
=16;

(3)22×101,
=22×100+22×1,
=2200+22,
=2222;

(4)45×36+54×36+36,
=(45+54+1)×36,
=100×36,
=3600;

(5)25×(4×27),
=(25×4)×27,
=100×27,
=2700;

(6)85×99+85,
=85×(99+1),
=85×100,
=8500.
解析分析:(1)依据减法性质解答;
(2)运用加法交换律和结合律解答;
(3)(4)(6)运用乘法分配律解答;
(5)运用乘法结合律解答.


点评:完成本题要注意分析式中数据,运用合适的简便方法计算.
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