A.340 | B.450 | C.460 | D.470 |
A.多4500 | B.少4500 | C.同样多 |
A.4 | B.3 | C.2 | D.1 |
A.252 | B.352 | C.276 |
A.700 | B.900 | C.200 |
A.500+200 | B.200+( )=500 | C.( )+200=500 | D.500-200 |
A.它们的和比1000大 | B.它们的和比800小一些 |
C.574不到600,384不到400,它们的和肯定不到1000 |
A.472-144 | B.328+144 | C.472+144 |
A.1200 | B.1400 | C.1600 | D.1800 |
A.364+137 |
B.853-195 |
C.752-284 |