有鸡和兔同笼，数一数头有40只，鸡的腿和兔的腿共有112条．鸡和兔各有多少只？
直接写出答案========
×=÷6=
直接写得数÷7= 42×= 6÷=×33=÷=+= 10÷1%=﹣20%=﹣= 24×50%=
直接写出得数．= 15=== 0.33==== 1﹣====
×= 1÷= 4×60%= 0.875÷0.125=÷2= 10÷=×3.6= 0×=
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×
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÷6=
÷7= 42×
= 6÷
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×33=
÷
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= 10÷1%=
﹣
= 24×50%=
= 15
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×
= 1÷
= 4×60%= 0.875÷0.125=
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×3.6= 0×
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