图书室有少儿读物280本，借给8个班，每班25本，还剩多少本？
直接写得数．×0=×=×12=×= 45×=÷=×=÷= 18×=×= 1÷=÷=
直接写出得数．×12=÷=（ ）2= 4﹣4×= 1×= 43÷=÷=×8+×8= 0.9×= 12×﹣=×7÷×7==
直接写出得数．÷= 0×=÷=÷1=÷= 1+=×=×=
直接写出得数． 12×=+=÷8=﹣=
直接等结果×1=﹣= 0.25×0.4=÷= 5+5= 16×（﹣）= 4×25%=÷4=
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×0=
×
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×12=
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×
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= 12×
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= 16×（
﹣
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÷4=