用你喜欢的方法计算下面各题．①23.8 ②37.5+12.5÷2.5×4 ③④ ⑤125×3.2×25 ⑥777×．
直接写得数： 1÷=+0.5=÷8=（+）×36=×= 5﹣=÷80%= 4﹣1﹣0.4=
直接写出得数．=== 5.6÷4= 3.4﹣8====
直接写出得数=== 3×===== 8×==
直接写出得数．=====×+=﹣=+=
直接写数对又快： 1÷=+=÷=（﹣）×18=÷3=×=﹣=×÷×=
②37.5+12.5÷2.5×4 ③
⑤125×3.2×25 ⑥777×
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