n+m=m+n is called ______ of addition.
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Natural number is the number of elements in a ______ set.
The connotation of data analysis is to obtain useful information from data and form knowledge. Is this statement correct?
The connotation of intuitive imagination is to perceive the shape and change of things with the help of spatial imagination, and to understand and solve mathematical problems by using geometric figures. Is this statement correct?
The connotation of mathematical operation is to solve mathematical problems according to operation rules on the basis of clarifying operation objects. It mainly includes understanding the operation object, mastering the operation rules, exploring the operation direction, selecting the operation method, designing the operation program and obtaining the operation result. Is this statement correct?