9000000-x=538266
x=9000000-538266
x=8461734
9000000-x=76896*7+1-7
9000000-x=538272+1-7
9000000-x=538273-7
9000000-x=538266
x=9000000-538266
x=8461734
9000000-x=538266
x=9000000-538266
x=8461734
9000000-x=76896*7+1-7
9000000-x=538272+1-7
9000000-x=538273-7
9000000-x=538266
x=9000000-538266
x=8461734
90 x 90 x 90 x 90 x 90 x 90 x 90 + 9000000 = ?????
9000000 + 1000000 = ?
9000000
+
8000000
----------------------
?
Tính nhẩm
7 x 9 = ..... 7 x 2 = ..... 7 x 5 = ..... 7 x 0 = .....
7 x 8 = ..... 7 x 3 = ..... 7 x 6 = ..... 7 x 1 = .....
7 x 7 = ..... 7 x 4 = ..... 7 x 10 = ..... 1 x 7 = .....
Tính nhẩm
7 x 2 = ..... 7 x 5 = ..... 7 x 6 = ..... 0 x 7 = .....
7 x 4 = ..... 7 x 3 = ..... 7 x 9 = ..... 7 x 0 = .....
7 x 8 = ..... 7 x 1 = ..... 7 x 10 = ..... 1 x 7 = .....
Viết số thích hợp vào chỗ chấm :
7 x 3 = ... 7 x 1 = ... 7 x 6 = ... 7 x 0 = ...
3 x 7 = ... 1 x 7 = ... 6 x 7 = ... 7 x 7 = ...
Tính nhẩm:
7 x 3 =
7 x 8 =
7 x 2 =
7 x 1 =
7 x 5 =
7 x 6 =
7 x 10 =
0 x 7 =
7 x 7 =
7 x 4 =
7 x 9 =
7 x 0 =
Tính nhẩm:
7 x 1 =
7 x 8 =
7 x 6 =
7 x 5 =
7 x 2 =
7 x 9 =
7 x 4 =
0 x 7 =
7 x 3 =
7 x 7 =
7 x 0 =
7 x 10 =
7 x 1 x 7 x 7 x 2 + 14 + 7 x 3 + 21 =