六一会演布置舞台背景，背景是一个长6米，宽4米的长方形布，每平方分米布3元，请算一算这块布需要多少钱？
直接写出得数．×=÷=÷= 1.8÷= 0.2÷3=÷=×=××0=×÷×= 18÷÷=
你能直接写出下列各题的结果吗？试试看×=÷=××= 4.5%=×12=÷4= （+）×== %
计算．×÷÷××÷6×÷7÷．
直接写得数．= 24÷======
直接写出得数． 12×=÷= 0÷=﹣= 12×（×）=×=÷= 20÷=+=×90×=
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