A.1∶99 | B.1∶100 | C.1∶101 | D.100∶1 |
A.形状相同 | B.周长相等 | C.面积相等 |
A.长×2+宽×2 | B.(长+宽)×2 | C.长×宽 |
A.20×(1-10%) | B.20÷(1+10%) | C.20÷(1-10%) | D.20×(1+10%) |
A.12厘米 | B.24厘米 | C.20厘米 | D.10厘米 |
A.50 | B.200 | C.100 |
A.50千米 | B.500千米 | C.5千米 |
A.30÷18 | B.(30–18)÷30 | C.(30-18)÷18 |
A.3 | B.9 | C.6 |
A.40 | B.38 | C.28 |