看谁口算又对又快．230+680= 300×6= 360+70= 0×189=56÷7= 350﹣260= 12×6= 160×4=0÷9= += += 1﹣=
如果从甲袋中取出千克放入乙袋中．两袋的重量刚好相等．原来甲袋比乙袋重多少千克？
看谁算得快．========
计算．=+===﹣=== 1=
口算．．
．
+
= 
+
=
千克放入乙袋中．两袋的重量刚好相等．原来甲袋比乙袋重多少千克？
=
=
=
=
=
=
=
=
=
+
=
=
=
﹣
=
= 1
=
．
．
粤公网安备 44130202000953号