口算大比拼
5×0= 510×7= 1﹣
= 0+0= 297×5≈
= 3000×2= 88×8= 
= 400×3=
26÷5= 
= 2×6+3= 875+25= 5+5×6=
口算大比拼
5×0= 510×7= 1﹣= 0+0= 297×5≈= 3000×2= 88×8= = 400×3=
26÷5= = 2×6+3= 875+25= 5+5×6=
= 
÷
= 
×
=
÷6= 
=
×
﹣
= 
×
= 
×
=
÷
= 
÷
= 
÷
= 
÷
=
÷
= 
×
= 
﹣
= 
×1.4=
= 24×
= 
+
= 0÷
=
= 
= 3÷
= 
=
= 
= 
= 
=
= 
=
×16= 12÷
= 0.3×
=
×
÷
÷
= 0×
+
=
×
÷
×
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