题目内容
先观察,再计算.
(1)5 ×3+5= |
5 ×4= |
(2)7 ×3+3= |
8 ×3= |
(3)4 ×6+6= |
5 ×6= |
(4)2 ×5-2= |
2 ×4= |
(5)9 ×4+9= |
( )×( )= |
(6)7 ×5-7= |
( )×( )= |
(7)3 ×7+3= |
( )×( )= |
(8)6 ×1+6= |
( )×( )= |
答案:20,20;24,24;30,30;8,8;45,5,9,45$45,9,5,45;28,7,4,28$28,4,7,28;24,3,8,24$24,8,3,24;12,2,6,12$12,6,2,12
解析:
解析:
20 ,20;24,24;30,30;8,8;45,5,9,45$45,9,5,45;28,4,7,28$28,7,4,28;24,3,8,24$24,8,3,24;12,2,6,12$12,6,2,12
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先观察,再计算.
(1)5 ×3+5= |
5 ×4= |
(2)7 ×3+3= |
8 ×3= |
(3)4 ×6+6= |
5 ×6= |
(4)2 ×5-2= |
2 ×4= |
(5)9 ×4+9= |
( )×( )= |
(6)7 ×5-7= |
( )×( )= |
(7)3 ×7+3= |
( )×( )= |
(8)6 ×1+6= |
( )×( )= |