学校每间教室都装有12条灯管，全校24个班共有多少条灯管？
计算×60= ×= ×=××= ÷5= 30÷=÷= ×÷=
直接写出得数．2.4﹣=16×20=÷6=（2﹣）×20%=2.2+3.57=+=×=14﹣14÷2=
2﹣1.02= 1+3.25= 4÷= 2.5×=﹣= 10﹣1= ﹣×= 0.37÷ =（1﹣100%）×3=
直接写出得数．32+68= 910﹣440= 18×10= 910÷70=12﹣= 10×10%= 2÷= 4.5×102=8.1÷0.03= ÷=
56+37=80﹣16=31.5+5=12﹣1.1=2×0.2=2.87÷0.7=30÷50=25×8=========
×60= 
×
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×
×
÷5= 30÷
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÷6=
）×20%=
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×
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+3.25= 4÷
= 2.5×
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﹣
= 10﹣1
= 
﹣
= 10×10%= 2÷
= 4.5×102=
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