600÷50= 3×5+15= 5×15+3= 350+80= 28×30=
450÷45= 300×6= 52÷13= 420÷21= 380﹣90=
760÷40= 14×5+8= 830×0= 8+7×5= 25×40=
600÷50= 3×5+15= 5×15+3= 350+80= 28×30=
450÷45= 300×6= 52÷13= 420÷21= 380﹣90=
760÷40= 14×5+8= 830×0= 8+7×5= 25×40=
×
= 1÷
=
×
= 77：63=
÷9=
×
=
÷8= 4：2.5=
×
=
×
= 0×
=
÷
=
=
=
=
×3=
×16=
×
=（
+
）×4=
×
+
×
=
+
=
÷3= 4÷
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
×1= 52﹣42= 0.75﹣0.5=
=
÷
= 125×0.08=
÷
= 0.15×6= 12÷0.3= 0÷
=
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