口算:①1000-889=______; ②4.5×20%=______; ③ 1 3 - 1 4 =______; ④1.
口算:①1000-889=______;②4.5×20%=______;③13-14=______;④1.25×32×25=______;⑤50÷0.02=______;...
口算:①1000-889=______; ②4.5×20%=______; ③ 1 3 - 1 4 =______; ④1.25×32×25=______; ⑤50÷0.02=______; ⑥ 4 9 ×27=______; ⑦1÷ 1 6 =______; ⑧ 3 8 - 3 8 ÷3=______.
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