13.哥哥今年m岁,弟弟今年n岁,再过x年后,他们相差( )岁.
A. | m-n | B. | m+x-n+x | C. | x |
12.m与n的差的7倍是( )
0 162444 162452 162458 162462 162468 162470 162474 162480 162482 162488 162494 162498 162500 162504 162510 162512 162518 162522 162524 162528 162530 162534 162536 162538 162539 162540 162542 162543 162544 162546 162548 162552 162554 162558 162560 162564 162570 162572 162578 162582 162584 162588 162594 162600 162602 162608 162612 162614 162620 162624 162630 162638 199269
A. | 7(m-n) | B. | m-7n | C. | 7m-n |