计算．（能简算的要写出简算过程）
①4.52+0.61+1.39+6.48
②4.27﹣（1.96﹣1.73）
③（294.4﹣19.2×6）÷（6+8）
④12.5×0.76×0.4×8×2.5．
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计算．（能简算的要写出简算过程）
①4.52+0.61+1.39+6.48
②4.27﹣（1.96﹣1.73）
③（294.4﹣19.2×6）÷（6+8）
④12.5×0.76×0.4×8×2.5．
= 1÷
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÷
= 8×
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+
= 5﹣
=
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×5= ②
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= ③2﹣
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÷1=
= ⑦
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÷21= ⑩
+
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×3= ，
×2= ，
×
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×
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÷4= ，
÷
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÷
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= ．
=
6= 0.52=
= 3.2+0.68= 6×
÷6×
×15=
×2=
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×34=
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= 0÷
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÷4= 1÷
= 22÷
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÷0.4=
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