A.345÷10÷5 | B.345÷5÷3 | C.345÷5×3 |
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.288÷18×2 | B.288÷6÷6 | C.288÷4÷9 |
A.99 | B.9990 | C.999 |
A.42×(18+12)=42×30 |
B.a+b×c=a+c×b |
C.4×a×5=a×(4×5) |
D.(125+50)×8=125×8+50×8 |
A.(a+b)+c=(a+c)+b |
B.a×b×c=a×c×b |
C.(a-b-c)×d=a×d-b×d-c×d |
A.44×25=40×25+4×25 |
B.44×25=11×(4×25) |
C.44×25=40×25-4×25 |
A.264700 | B.153300 | C.365700 | D.53300 |
A.37+28+63 | B.4×28×25 | C.4×17+25 |
A.40 | B.36 | C.10 |