直接写得数.
| 0.2×0.14﹦ | 3.4+1.6﹦ | 0.73-0.3﹦ | 7.1+1.09= | 3.5×20﹦ |
| 30÷0.6﹦ | 20-19.3= | 0.36÷1.2= | 1.2×0.4+0.4×1.3= | 4×0.5÷4×0.5= |
递等式计算.(能简便的要简便计算,并写出主要过程)
| 628-46+454 | 164+36÷3×16 | (80-1)×125 |
| (49+49+49+49)×250 | 45×54+45×45+45 | 25×[364÷(201-173)]. |
简算
| 0.45×201 | 1.6×55.4-55.4×0.6 |
| 5.8+2.49+8.51+4.2 | 1.25×0.32×2.5. |