A.76×125×8 | B.32×25×125 | C.98×45 |
A.720÷9÷2 | B.720÷9×2 | C.720÷2×9 |
A.24×2×8 | B.24×15+24 | C.24×15-15 |
A.900 | B.1000 | C.1100 |
A.100×125+1 | B.125×100×1 | C.125×100+125 |
A.345÷10÷5 | B.345÷5÷3 | C.345÷5×3 |
A.100×125+1 | B.100×125+125 |
C.125×100×1 | D.100×125×1×125 |
A.a×b=b×a | B.(a×b)×c=a×(b×c) | C.(a+b)×c=a×c+b×c |
A.乘法交换律和结合律 | B.乘法交换律和分配律 | C.乘法结合律 |
A.分配律 | B.交换律 | C.结合律 |