四年级小数加减法口算题.pptx1
-= 1-= +=
+= 1-= -=
-= -= +=
+ = 6 -= -=
+ = -3= -=
-= 1-= +=
+= -= -=
+= -= -=
+= -= +=
+= 3-= -=
-= 15-= -=
+= += +=
-99= += -=
+= -= +=
+= += +=
-= -= 5-=
+= += +=
+= += +=
+= += +=
+= += +=
+= -= +=
+= 20+= +=
-3= -= +=
2-= += -=
+= -= +=
-= 2+= +=
-= -= +=
-= 1-= +=
1-= -4= +4=
10-= 6+
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