55 – 8 = ?
55
-7
• 5 kh«ng trõ ® îc 8, lÊy
15 trõ 8 b»ng 7, viÕt 7, nhí 1.
• 5 trõ 1 b»ng 4, viÕt 4.
8
4
55 – 8, 56 – 7, 37 – 8, 68 – 9
Trang 255 – 8, 56 – 7, 37 – 8, 68 - 9
Bµi 1: TÝnh
45
9
-36
75 6
-69
95 7
-88
65 8
-57
15 9
6
66
7
-59
96 9
-87
36 8
-28
56 9
-47
46 7
-39
Trang 355 – 8, 56 – 7, 37 – 8, 68 - 9
Bµi 1: TÝnh
87
9
-78
77 8
-69
48 9
-39
58 9
-49
35 7
28
Trang 455 – 8, 56 – 7, 37 – 8, 68 - 9
Bµi 3: VÏ h×nh theo mÉu