脱式计算,能用简便方法计算的要用简便方法计算.145×9+306÷3; ...

2024-11-15 23:44:31
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回答1:

(1)145×9+306÷3
=1305+102
=1407;                           

(2)(64+56)÷24
=120÷24
=5;

(3)45+240÷40
=45+6
=51;                              

(4)184×17+63×184
=184×(17+63)
=184×80
=14720;

(5)544-166-145
=378-145
=233;

(6)4000÷125÷8
=4000÷(125×8)
=4000÷1000
=4.