A.1 | B.0.1 | C.0.01 |
A.多了1.8 | B.小了1.8 | C.多了1.2 | D.多了3 |
A.2 | B.3 | C.4 |
A. | B. |
C. | D. |
A.18 | B.36 | C.40 | D.42 |
A.478.5 | B.130.5 | C.178.5 | D.215 |
A.乘法分配律 | B.乘法交换律 | C.乘法交换律和乘法结合律 |
A.33.2 | B.49.8 | C.66.4 | D.83 |
A.1.2 | B.2.3 | C.5 | D.4.6 |
A.0.25×16×2 | B.0.25×4×8 | C.0.25×30+0.25×2 | D.0.5×0.5×32 |