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脱式计算.(能简算的要简算)(1)14+2.25-0.25+7.75(2)3÷27+79+19(3)813+817+513+917(4)1.25×3.2×0.25.

题目详情
脱式计算.(能简算的要简算)
(1)
1
4
+2.25-0.25+7.75       
(2)3÷27+
7
9
+
1
9

(3)
8
13
+
8
17
+
5
13
+
9
17
         
(4)1.25×3.2×0.25.

1
4
+2.25-0.25+7.75       
(2)3÷27+
7
9
+
1
9

(3)
8
13
+
8
17
+
5
13
+
9
17
         
(4)1.25×3.2×0.25.
1
4
141144
7
9
+
1
9

(3)
8
13
+
8
17
+
5
13
+
9
17
         
(4)1.25×3.2×0.25.
7
9
797799
1
9

(3)
8
13
+
8
17
+
5
13
+
9
17
         
(4)1.25×3.2×0.25.
1
9
191199
8
13
+
8
17
+
5
13
+
9
17
         
(4)1.25×3.2×0.25.
8
13
813881313
8
17
+
5
13
+
9
17
         
(4)1.25×3.2×0.25.
8
17
817881717
5
13
+
9
17
         
(4)1.25×3.2×0.25.
5
13
513551313
9
17
         
(4)1.25×3.2×0.25.
9
17
917991717
▼优质解答
答案和解析
(1)14+2.25-0.25+7.75  =0.25+2.25-0.25+7.75  =(0.25-0.25)+(2.25+7.75)=0+10=10(2)3÷27+79+19=19+79+19=1(3)813+817+513+917 =(813+513)+(817+917 )=1+1=2(4)1.25×3.2×0.25=1.25×0.8×4...