奶奶养鹅26只，养鸭30只，养鸡45只，①鸭比鹅多几只？②鸭比鸡少多少只？③请你再提出一个问题，再列式解答出来好吗？
口算．0.75+= 0÷= ×= +20%=30÷= ×12×= 63：27= ：=
直接写出得数．= = = = == = = = =
直接写出得数：2.4×= ； = ； ：0.75= ； ÷ =0.1；0.180%×= ； 32÷（1+60%）= ； 2﹣1= ； ×40=．
= = = == = = =
直接写得数．÷3= 10÷= ÷= ×=÷= ×= 4×= 1﹣=×60= ×= ×= ××=÷5= 30÷= ÷= ×÷=
= 0÷
= 
×
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+20%=
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×12×
= 63：27= 
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= 
= 
=
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= 
= 
= 
=
= ； 
= ； 
：0.75= ； 
÷ =0.1；
= ； 32÷（1+60%）= ； 2﹣1
= ； ×40=
．
= 
= 
= 
=
= 
= 
= 
=
÷3= 10÷
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÷
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×
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÷
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×
= 4×
= 1﹣
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×60= 
×
= 
×
×
×
=
÷5= 30÷
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÷
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×
÷
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