在一块平行四边形的菜地里种辣椒，已知这块菜地的底是40米，高是0.9米，如果每棵辣椒苗占地0.18平方米，这块地可种辣椒多少棵？
直接写得数
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÷9= 1﹣
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直接写出得数．
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×2=
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÷4=
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= 12×
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÷42=
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×14=
÷4=
口算
78﹣0.8= 18×40= 910÷70= 1÷
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3﹣
= 3.48+6.52=
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= 0.8﹣
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直接写得数．
2/5﹣1/10= 16÷2/7= 1/2÷3/5= 1/7×1/7= 1/4×2/5=
5/6﹣1/2= 2/7×0+9= 3/5×1/21= 2/7×21= 14/17÷7=
1÷5﹣1/5= 4/7+4/7×6=（1/8+4/8）×4/5= 6×5÷1/2= 1/9÷1/3=
5/9×1/5÷5/9×1/5=
直接写出得数．
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= 1﹣1%=