列竖式计算．872÷8= 859÷7= 338÷4= 42×28= 68×42= 25×36=
直接写得数：+= 1﹣= 1÷=﹣=×= 0÷= 0.9+99×0.9=（+）×12=
直接写出得数． （1）1﹣= 1÷=﹣=×= 0÷= （2）28×0.1= 1.3×3= 2.1×0.4= 5.4÷0.9= 10﹣9.99=
直接写出得数．+=﹣=÷= 1÷=×=××= 8×+8×= 55×÷=×÷×= 0×+=
直接写得数 5﹣=×16= 1÷=÷=×=+=﹣= 6﹣=×6=（+）×8=
直接写得数+=﹣=×=×5= 2﹣= 3÷7=÷=÷4=
+
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