竖式计算．121×12= 5×910= 408×33= 312×16=
×16=×=﹣=×= 6÷=÷=÷4=÷=+=﹣= 100×= 8×= 1÷=﹣= 12÷= 0×=
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=﹣=
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×16=
×
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﹣
=
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÷
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÷4=
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﹣
= 100×
= 8×
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﹣
= 12÷
= 0×
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×0=
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×12=
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