Các câu hỏi tương tự
Tính nhẩm:
7 x 8 = ..... 16 : 2 = ..... 36 : 6 = ..... 49 : 7 = .....
2 x 5 = ..... 72 : 8 = ..... 9 x 3 = ...... 63 : 7 = .....
6 x 4 = ..... 25 : 5 = ..... 4 x 8 = ...... 7 x 5 = ......
a .(18 – 9 x 2) x (2 + 4 + 6 + 8 + 10)b.(7 x 8 – 56 ) : (2 + 4 + 6 + 8 + 112)c. (2 + 125 + 6 + 145 + 112) x (42 – 6 x 7)d.(12 x 6 – 12 x 4 – 12 x 2) x ( 347 + 125)e(a x 7 + a x 8 – a x 15) : (1 + 2 + 3 + ........ + 10)f.58 – 58 x (6 + 54 – 60)g.32 + 63 x a x ( a x 1 – a : 1) + 32 x 8 + 32h.(1 + 2 + 3 + 4 + .... + 9) x (21 x 5 – 21 – 4 x21)i.(9 x 7 + 8 x 9 – 15 x 9) : (1 + 3 + 5 + 7 + ........+ 17 + 19)k.(2 + 4 + 6 + 8 + ... + 20) x (56 x 3 – 72 : 9 x 21)
Đọc tiếp
a .(18 – 9 x 2) x (2 + 4 + 6 + 8 + 10)
b.(7 x 8 – 56 ) : (2 + 4 + 6 + 8 + 112)
c. (2 + 125 + 6 + 145 + 112) x (42 – 6 x 7)
d.(12 x 6 – 12 x 4 – 12 x 2) x ( 347 + 125)
e(a x 7 + a x 8 – a x 15) : (1 + 2 + 3 + ........ + 10)
f.58 – 58 x (6 + 54 – 60)
g.32 + 63 x a x ( a x 1 – a : 1) + 32 x 8 + 32
h.(1 + 2 + 3 + 4 + .... + 9) x (21 x 5 – 21 – 4 x21)
i.(9 x 7 + 8 x 9 – 15 x 9) : (1 + 3 + 5 + 7 + ........+ 17 + 19)
k.(2 + 4 + 6 + 8 + ... + 20) x (56 x 3 – 72 : 9 x 21)
Tìm x:
56/x=7 72/x=9 68*x=408 36*x=216
Tìm x biết:
a, ( x – 266) : 5 = 7
b, (x - 129) × 4 = 36
c, 786 – x = 5 × 4 : 2
d, x + 24 : 4 × 3 = 285
Tìm x
a) x * 6 = 72 - 18 b) 48 : x = 36 : 6 c) x * 9 = 108 : 2 d) x : 7 = 28 * 2
Tính nhẩm8 x 2 ....... 8 x 3 ....... 8 x 4 ....... 8 x 5 .......16 : 8 ..... 24 : 8 ..... 32 : 8 ..... 40 : 8 .....8 x 6 ....... 8 x 7 ....... 8 x 8 ....... 8 x 9 .......48 : 8 ..... 56 : 8 ..... 64 : 8 ..... 72 : 8 .....
Đọc tiếp
Tính nhẩm
8 x 2 = ....... 8 x 3 = ....... 8 x 4 = ....... 8 x 5 = .......
16 : 8 = ..... 24 : 8 = ..... 32 : 8 = ..... 40 : 8 = .....
8 x 6 = ....... 8 x 7 = ....... 8 x 8 = ....... 8 x 9 = .......
48 : 8 = ..... 56 : 8 = ..... 64 : 8 = ..... 72 : 8 = .....
Tính nhẩm
9 x 2 ......
9 x 3 ......
9 x 4 ......
9 x 5 ......
18 : 9 ......
27 : 9 ......
36 : 9 ......
45 : 9 ......
9 x 6 ......
9 x 7 ......
9 x 8 ......
9 x 9 ......
54 : 9 ......
63 : 9 ......
72 : 9 ......
81 : 9 ......
Đọc tiếp
Tính nhẩm
| 9 x 2 = ...... | 9 x 3 = ...... | 9 x 4 = ...... | 9 x 5 = ...... |
| 18 : 9 = ...... | 27 : 9 = ...... | 36 : 9 = ...... | 45 : 9 = ...... |
| 9 x 6 = ...... | 9 x 7 = ...... | 9 x 8 = ...... | 9 x 9 = ...... |
| 54 : 9 = ...... | 63 : 9 = ...... | 72 : 9 = ...... | 81 : 9 = ...... |
Tìm xa) X + 15 20 b) X – 18 16 c) 72 – x 50
................ ................... .................. ................ ................... .................. ................ ................... ..................d) X x 7 42 e) X : 7 5 f) 49 : x 7 ................ ................... .................. ................ ................... .....
Đọc tiếp
Tìm x
a) X + 15 = 20 b) X – 18 = 16 c) 72 – x = 50
................ ................... ..................
................ ................... ..................
................ ................... ..................
d) X x 7 = 42 e) X : 7 = 5 f) 49 : x = 7
................ ................... ..................
................ ................... ..................
................ ................... ..................
1 x 9 = 9
2 x 9 = 18
3 x 9 = 27
4 x 9 = 36
5 x 9 = 45
6 x 9 = 54
7 x 9 = 63
8 x 9 =72
9 x 9 = 81
10 x 9 = 90
Câu hỏi là : 9 + 18 + 27 + 36 + 45 + 54 + 63 + 72 + 81 +90 =????