怎么算都等于7

任意一个数乘以0加7

$a times 0 + 7 = 7$，其中 $a$ 是任意数。

基本的加法

$1 + 6 = 7$

$2 + 5 = 7$

$3 + 4 = 7$

$4 + 3 = 7$

$5 + 2 = 7$

$6 + 1 = 7$

$10 - 3 = 7$

$9 - 2 = 7$

$8 - 1 = 7$

$1 + 2 + 1 + 2 + 1 = 7$

$1 + 2 - 3 - 4 + 5 + 6 = 7$。

基本的减法

$10 - 3 - 2 + 1 = 7$

$11 - 4 - 3 + 2 = 7$

$12 - 5 - 3 + 2 = 7$

$13 - 6 - 3 + 2 = 7$

$14 - 7 - 3 + 2 = 7$

$15 - 8 - 3 + 2 = 7$

$16 - 9 - 3 + 2 = 7$

$17 - 10 - 3 + 2 = 7$

$18 - 11 - 3 + 2 = 7$

$19 - 12 - 3 + 2 = 7$

$20 - 13 - 3 + 2 = 7$

$21 - 14 - 3 + 2 = 7$

$22 - 15 - 3 + 2 = 7$

$23 - 16 - 3 + 2 = 7$

$24 - 17 - 3 + 2 = 7$

$25 - 18 - 3 + 2 = 7$

$26 - 19 - 3 + 2 = 7$

$27 - 20 - 3 + 2 = 7$

$28 - 21 - 3 + 2 = 7$

$29 - 22 - 3 + 2 = 7$

$30 - 23 - 3 + 2 = 7$

$31 - 24 - 3 + 2 = 7$

$32 - 25 - 3 + 2 = 7$

$33 - 26 - 3 + 2 = 7$

$34 - 27 - 3 + 2 = 7$

$35 - 28 - 3 + 2 = 7$

$36 - 29 - 3 + 2 = 7$

$37 - 30 - 3 + 2 = 7$

$38 - 31 - 3 + 2 = 7$

$39 - 32 - 3 + 2 = 7$

$40 - 33 - 3 + 2 = 7$

$41 - 34 - 3 + 2 = 7$

$42 - 35 - 3 + 2 = 7$

$43 - 36 - 3 + 2 = 7$

$44 - 37 - 3 + 2 = 7$

$45 - 38 - 3 + 2 = 7$

$46 - 39 - 3 + 2 = 7$

$47 - 40 - 3 + 2 = 7$

$48 - 41 - 3 + 2 = 7$

$49 - 42 - 3 + 2 =