能简便计算就简便计算21×(230-192÷4)437-37×4+168 678+678×996...
能简便计算就简便计算21×(230-192÷4)437-37×4+168678+678×996.45-0.58-1.4225×4445000÷(45×25)...
能简便计算就简便计算21×(230-192÷4)437-37×4+168 678+678×996.45-0.58-1.42 25×44 45000÷(45×25)
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(1)21×(230-192÷4)
=21×(230-48)
=21×182
=3822;
(2)437-37×4+168
=437-148+168
=289+168
=457;
(3)678+678×99
=678×(1+99)
=678×100
=67800;
(4)6.45-0.58-1.42
=6.45-(0.58+1.42)
=6.45-2
=4.45;
(5)25×44
=25×(4×11)
=25×4×11
=100×11
=1100;
(6)45000÷(45×25)
=45000÷45÷25
=1000÷25
=40.
=21×(230-48)
=21×182
=3822;
(2)437-37×4+168
=437-148+168
=289+168
=457;
(3)678+678×99
=678×(1+99)
=678×100
=67800;
(4)6.45-0.58-1.42
=6.45-(0.58+1.42)
=6.45-2
=4.45;
(5)25×44
=25×(4×11)
=25×4×11
=100×11
=1100;
(6)45000÷(45×25)
=45000÷45÷25
=1000÷25
=40.
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