A.190 | B.154 | C.200 |
A.长得多 | B.短得多 | C.短一些 |
A.1499![]() | B.600 | C.1500![]() | D.999 |
A.90 | B.100 | C.110 |
A.829-569 ![]() | B.829+569 ![]() | C.569+260 |
A.780-630 | B.780-630+1 | C.780-630-1 | D.780+630 |
A.它们的和比500大,比600小 ![]() |
B.它们的和比500小,比400大 ![]() |
C.它们的和比600大 |
A.6042 | B.6003 | C.6200 |
A.加法交换律 | B.加法结合律 | C.加法交换律和结合律 |
A.1个十 | B.1个百 | C.1个千 |