某洗衣机厂前3天平均每天生产洗衣机680台，后3天共生产洗衣机2220台，平均每天生产洗衣机多少台？
直接写出得数． 24×= 1÷=×12=×18÷3=÷=（﹣）×=×÷×=
直接写得数．============
直接写得数．×=×12=×=÷=÷= 9×=÷═÷12=
直接写得数．=== 3.2÷40%=====
直接写出得数．×=﹣= 0÷= 5÷= 70×=
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