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简算.(1)999999×7+111111×37(2)24×(512-16)(3)37×3536(4)56×113+59×213+518×613.

题目详情
简算.
(1)999999×7+111111×37      
(2)24×(
5
12
-
1
6
)        
(3)37×
35
36

(4)
5
6
×
1
13
+
5
9
×
2
13
+
5
18
×
6
13
▼优质解答
答案和解析
(1)999999×7+111111×37,
=111111×63+111111×37
=111111×(63+37),
=111111×100,
=11111100;

(2)24×(
5
12
-
1
6
),
=24×
5
12
−24×
1
6

=10-4,
=6;     

(3)37×
35
36

=(36+1)×
35
36

=36×
35
36
+1×
35
36

=35+
35
36

=35
35
36


(4)
5
6
×
1
13
+
5
9
×
2
13
+
5
18
×
6
13

=
1
6
×
5
13
+
2
9
×
5
13
+
6
18
×
5
13

=(
1
6
+
2
9
+
6
18
)×
5
13

=
13
18
×
5
13

=
5
18