直接写出结果．450÷90= 730﹣280= 70×300= 125×8= 2400÷60=7200÷25÷4= 416÷70≈ 120÷39≈ 49×5≈ 507×48≈
直接写得数=== 3÷8=========
直接写出得数． 93= 8.7﹣7=÷1= 21÷7= 7×÷7×= 44÷= 75÷10%= 0.9+99×0.9=
直接写出得数．
直接写出得数．÷=+=÷=×= 1÷0.25=÷1=÷3=﹣=
直接写出得数．÷=×3= 6×=+×7= 100÷10%=÷1=÷7=
=
=
= 3÷8=
=
=
=
=
=
=
=
=
÷1
= 21
÷7=
÷7×
= 75÷10%= 0.9+99×0.9=
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÷
=
+
=
÷
=
×
=
÷1=
÷3=
﹣
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÷
=
×3= 6×
=
+
×7=
÷1=
÷7=
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