A.25×9×4=(25×4)×9 | B.23×35=35×23 |
C.36×19+36=36×(19+1) | D.125×88=125×8×11 |
A.100×76+1 | B.100×76+100 | C.100×76+76 |
A.14×11-14×9 | B.11×14+14×9 | C.14×11×9 | D.11+14×9 |
A.36×100-2 | B.36×(100-2) | C.36×98+2 | D.36×(98+2) |
A.15×26+15×74 | B.(40-4)×25 |
C.67+33×5 | D.38×99+38 |
A.100×99+25×99 | B.125×100+125×1 | C.125×90×9 | D.125×100-125 |
A.54×100-54 | B.54×100+54 | C.55×100-54 | D.54×100-1 |
A. | B. |
C. | D. |
A.125×8×3 | B.125×2×12 |
C.(25-1)×125 | D.125×23+1 |
A.交换律 | B.结合律 | C.分配律 | D.交换律和结合律 |