请问这四道题的简便运算怎么做
2个回答
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12.5*0.25*3.2
=(12.5*0.8)*(0.25*4)
=10*1
=10
0.45/0.6/0.5
=0.45/(0.6*0.5)
=0.45/0.3
=1.5
0.67*99
=0.67*(100-1)
=67-0.67
=66.37
5.52-(3.52+1.49)
=5.52-3.52-1.49
=2+1.49
=3.49
=(12.5*0.8)*(0.25*4)
=10*1
=10
0.45/0.6/0.5
=0.45/(0.6*0.5)
=0.45/0.3
=1.5
0.67*99
=0.67*(100-1)
=67-0.67
=66.37
5.52-(3.52+1.49)
=5.52-3.52-1.49
=2+1.49
=3.49
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