口算．
400×3= 580﹣80= 4500÷90= 37×2=
840÷2= 188+12= 540÷9= 6300÷7=
340+600= 120×4= 350+50= 200×5=
320﹣68= 240÷80= 191+9= 4000÷50=
相关试题
口算．
400×3= 580﹣80= 4500÷90= 37×2=
840÷2= 188+12= 540÷9= 6300÷7=
340+600= 120×4= 350+50= 200×5=
320﹣68= 240÷80= 191+9= 4000÷50=
+
=
×
=
÷
=
﹣
= 52=．
×12= 630×9%=
÷
= 1﹣
=
+
= 0×
÷
=
×
= 18÷0.03=
×
=
+
= 2﹣
= 13.2×0.5=
×14=
÷
=
×80= 99÷
= 9.6×
=
= 7÷
=
÷
=
×
÷
=
×
÷
=
×0+
=
×
÷
=
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