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口算．
          1
          3
          ×（15+
          6
          7
          ）=          		
48×（
          1
          4
          -
          1
          6
          ）=          		
32.6÷100=

          1
          5
          -
          1
          5
          ÷5=
          

          
（
          1
          5
          -
          1
          6
          ）×30=          		
9.1÷0.07=

          2
          5
          ×
          3
          5
          ×2=          		
1-0.5%=
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          分析：本題直接根據(jù)運算法則進(jìn)行計算．
          解答：解：
          1
          3
          ×（15+
          6
          7
          ）=5
          2
          14
                    48×（
          1
          4
          -
          1
          6
          ）=4                 32.6÷100=0.326                 
          1
          5
          -
          1
          5
          ÷5=
          4
          25

          （
          1
          5
          -
          1
          6
          ）×30=1                 9.1÷0.07=130                   
          2
          5
          ×
          3
          5
          ×2=
          12
          25
                             1-0.5%=99.5%
          點評：本題可根據(jù)運算法則直接運算，有的題目可以應(yīng)用乘法分配律進(jìn)行簡算，注意看清運算順序和運算符號．
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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          1
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口算．
          1
          3
          +
          1
          4
          =          		

          1
          5
          -
          1
          6
          =          		
1-
          5
          8
          =          		

          1
          4
          +
          1
          5
          =
          

          

          2
          7
          +
          1
          3
          =          		
1-
          7
          15
          =          		

          3
          4
          -
          1
          6
          =          		

          7
          10
          -
          1
          2
          =
          

          

          3
          8
          -
          1
          4
          =          		

          5
          9
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          9
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          1
          2
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          4
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          1
          3
          -
          1
          4
          =          		

          1
          5
          -
          1
          10
          =          		

          7
          9
          ×
          6
          7
          =          		

          6
          7
          ÷6          =          		

          12
          13
          ×26          =
          

          
1÷
          5
          6
          =          		

          3
          4
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          =          		
28×
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          =          		

          7
          8
          ×
          4
          7
          =          		

          2
          5
          ×99+
          2
          5
          =
          

          
14÷
          1
          5
          =          		
(
          2
          3
          -
          1
          2
          )×12          =          		
1÷
          1
          4
          ×4          =          		
15×
          1
          3
          =          		

          1
          3
          +
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          13
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          13
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          1
          4
          ×
          1
          3
          =          		

          4
          7
          ÷2          =          		

          1
          2
          ÷
          1
          2
          =          		
10÷
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          6
          =          		

          2
          3
          ×
          3
          4
          =          		

          9
          10
          ÷
          1
          5
          =
          

          

          1
          6
          ÷6          =          		

          8
          9
          ÷4          =          		
15×
          4
          5
          =          		
15÷
          1
          3
          =          		

          3
          4
          ×
          2
          9
          =          		

          2
          3
          ÷
          1
          2
          =
          

          

          2
          5
          ×
          1
          2
          =          		

          1
          2
          ÷
          1
          4
          =          		

          1
          2
          ×
          1
          4
          =          		

          4
          5
          ÷
          1
          5
          =          		

          3
          7
          ×14          =          		

          1
          4
          ÷
          1
          2
          =
          

          

          1
          2
          -
          1
          4
          =          		

          4
          9
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          3
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          =          		

          5
          8
          ×
          2
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          =          		

          1
          6
          ÷
          2
          3
          =          		

          1
          2
          +
          1
          4
          =          		

          3
          5
          ÷1          =
          

          

          7
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1÷
          3
          4
          =          		

          1
          2
          ÷
          1
          4
          =          		
1÷
          3
          5
          =          		

          3
          4
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          +
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1+
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          2
          9
          ×
          1
          4
          =          		

          8
          3
          ÷2          =          		

          3
          5
          ÷
          2
          5
          =          		

          5
          9
          ÷3          =          		

          5
          6
          ×
          3
          10
          =          		

          2
          5
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8×
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