直接写出得数．==== 100÷50%= 0.25﹣= 1﹣20%= 0.3×30%=×4= 1÷÷=×30= 1﹣=
直接写出结果﹣=，×1.2=，5﹣1﹣1.6=，÷=， 2×0=，÷9=，×12=，0.25×4=，÷=，×20%=．
直接写出得数+=﹣=+= 1﹣=+==+=﹣= 3﹣=+= 3÷7= 43=
直接写得数．+= 3﹣1.75=÷=×=×=÷=÷=×0+3=（+）×=
直接写出得数．+=﹣=×2=×=÷3×÷3== 12×=×14=÷4=+÷+=
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=
=
=
= 100÷50%=
= 1﹣20%= 0.3×30%=
×4= 1÷
×30= 1﹣
=
﹣
=，
×1.2=，5﹣1
﹣1.6=，
÷
=，
×0=，
÷9=，
×12=，0.25×4=，
÷
=，
×20%=．
+
=
﹣
=
+
= 1﹣
=
=
=
+
=
﹣
= 3﹣
=
+
= 3÷7= 43=
+
= 3
﹣1.75=
÷
=
×
×
=
÷
=
÷
=
×0+3=（
+
）×
=
+
=
﹣
=
×2=
×
=
÷3×
= 12×
=
×14=
÷4=
+
+