，正好用去15千克。这桶水重多少千克？ 
．32÷ = |  × = | 1﹣20%= |
3.2× = |  ÷50%= | 0.4÷60%= |
A．14× | B．14÷ | C．÷14 |
 + = |  _ = |  ×2= |  × = |
 ÷60%= |  × = |  ÷4= |  ÷ = |
12× = |  ÷42= | 2﹣ = | 3 +1.75= |
 ÷4= | 1÷ × = |
14× = | 6÷ = |  ÷ = | 8×= |  ÷8= |
 ÷ = | 10%×= | 15÷1%= | × = | 1÷0.01= |
米的
是 米 小时的
是
小时． 
÷
÷
． 
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