2.怎样简便就怎样算
44×25 | 591+482+118 | 99×126 | 986+1999 |
125×15×8 | 473+79-63 | 4600÷25÷4 | 136×101-136 |
1.口算我最棒
480-101= | 598+99= | 125×37×8= |
(35+49)÷7= | 18×11= | 210÷35= |
396-28-22= | 62×(100+1)= | 125-5×5= |
20.125×5+125×3=125×(5+3)这是根据( )
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A. | 乘法交换律 | B. | 乘法分配律 | C. | 乘法结合律 |