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=
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= 12×0.5= 2.5×0.6=
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