小华用平底锅烙饼，这只锅同时能放4张大饼，烙一张要4分钟（每面各需要2分钟），可小华烙6张饼只用了6分钟．他是怎样做的呢？
直接写出得数． 40×30= 90÷3= 100+25= 0÷8= 181÷2=+= 1﹣= 360÷6= 20×7= 79×2=
直接写出得数． 6.4﹣4== 0.25×12=== 4.8÷0.1===
直接写出得数． 0.83+0.27= 2.9×100= 50÷1000= ×10=0.7 80÷ =0.8+= 5.6+4= 0.13×1000=﹣0.35=
直接写出得数．+=﹣+=+=﹣=+=+=++=﹣=+= 3﹣﹣=
直接写出得数﹣=﹣=﹣=+=+=﹣=+=﹣=
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