给一个房间铺地砖，用长4分米、宽3分米的长方形地砖60块正好铺满．如果改用边长4分米的正方形地砖，那么需要多少块砖正好铺满？
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=．
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直接写得数．÷3= 10÷=÷=×=÷=×= 4×= 1﹣=×60=×=×=××=÷5= 30÷=÷=×÷=
直接写出得数． 16×=×=×=÷=÷= 9÷=××=
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：0.75= ；
÷ =0.1；
= ； 32÷（1+60%）= ； 2﹣1
= ； ×40=
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÷3= 10÷
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= 4×
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×60=
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÷5= 30÷
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×
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= 9÷
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