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+
= 
÷5= +
﹣
+= 1.25×8=
0.15×1.2+3.8×15%= 2﹣
÷
= 0.25+0.75= 
+×0=
（﹣
）×
= 4505÷5= 24.3﹣8.87﹣0.13= ．
+= ÷5= +﹣+= 1.25×8=
0.15×1.2+3.8×15%= 2﹣÷= 0.25+0.75= +×0=
（﹣）×= 4505÷5= 24.3﹣8.87﹣0.13= ．
=
=
=
=
= 
+
= 
×
= 1÷
=
= 1.2×0.3= 2.5×0.4=
= 
= 
=
÷18= 
③0.805÷0.7= 
×1.2）÷（1×2.4×0.18）= 
⑤4270÷14+305×99= 30500⑥100﹣58.3÷3﹣6×13.4= 
）= 59⑧
= ．
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