配制一种农药，药粉和水的比是1：500，（1）现有水6000千克，配制这种农药需要药粉多少千克？（2）现有药粉3.6千克，配制这种农药需要水多少千克？
直接写得数． 9.3×7.9≈ ×0.5=1×=+=÷2=×5÷×5= 0.42= 0.561×100=
直接写出得数+=÷45%= 30﹣29.02=﹣+= （×12= 1.25××8= 8.2+0.54+0.46=÷﹣=
直接写出得数=== 0.9+99×0.9= 8.8÷0.2====
直接写出得数． 2﹣= 0÷÷=+3= 134﹣34=×=÷×=﹣= 4×=
﹣= 24×= 6+=÷5= 5﹣=÷=×0.5= 0.4÷=×=+=
×
=
+
=
÷2=
+
=
÷45%= 30﹣29.02=
﹣
+
=
×12= 1.25×
×8= 8.2+0.54+0.46=
÷
=
=
= 0.9+99×0.9=
=
=
=
= 0÷
÷
=
+3= 134﹣34=
×
=
÷
×
﹣
= 4×
=
﹣
= 24×
= 6+
=
÷5= 5﹣
=
÷
=
×0.5= 0.4÷
×
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+
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