学校要砌一道长80米、厚0.24米、高1.5米的围墙，如果每立方米用砖525块，砌这道围墙共需要多少块砖？
口算：×3= ，×2= ，×= ，×= ，÷4= ，÷= ，÷= ，÷= ．
直接写出得数．15×= 6= 0.52=30：= 3.2+0.68= 6×÷6×=
直接写得数×15= ×2= ×= ×= ×=1×= ×= ×34= ×= ×=×= ×= ÷10= ÷= 0÷=÷4= 1÷= 22÷= ÷= ÷0.4=
直接写出得数．×25= ÷6= 0.54+O.46= 9﹣=（）×30= = 177+99= 3÷7== 0.9×99+0.9=
×16= ×= ﹣= ×=6÷= ÷= ÷4= ÷=+= ﹣= 100×= 8×=1÷= ﹣= 12÷= 0×=
×3= ，
×2= ，
×
= ，
×
= ，
÷4= ，
÷
= ，
÷
÷
= ．
= 
6= 0.52=
= 3.2+0.68= 6×
÷6×
×15= 
×2= 
×
= 
×
= 
×
=
= 
×
= 
×34= 
×
= 
×
=
×
= 
×
= 
÷
= 0÷
=
÷4= 1÷
= 22÷
= 
÷
÷0.4=
×25= 
÷6= 0.54+O.46= 9﹣
=
）×30= 
= 177+99= 3÷7=
= 0.9×99+0.9=
×16= 
×
= 
﹣
= 
×
=
= 
÷
= 
÷4= 
÷
=
+
= 
﹣
= 100×
= 8×
= 
﹣
= 12÷
= 0×
=
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