计算，能简算的要简算
① 588÷21﹣1.6×3.5 ② 25×125×16 ③ 3.6﹣2.8+7.4﹣6.2
④8.6÷
+1.4×2.7 ⑤ 4÷
﹣÷4 ⑥ 
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相关试题
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=口算：
0.4×0.02= 3.5＋7.6= 1.23÷3= 2.4×2.5= 16÷1.6= 0.9÷0.01=7÷0.25= 99×0.25=
12×0.4＋0.4×13= 4×(1.5＋0.25) =
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