有7袋洗衣粉，其中6袋每袋500g，另外1袋不是500g，但不知道比500g重还是轻．你能用天平称出来吗？
口算×= 8﹣1= 3+7.6=÷= 200×75%=÷6+= 12÷12%= 7﹣（2+）=
45+27= 2.6﹣1.2= 8×0.9= 4.8÷8==== 48÷=
直接写出得数． 21.8+8.2=÷=×= 5﹣= 8×25×1.25=×=+= 1÷= 25÷10%=（0.28+0.7）÷7=
直接写出得数+3÷=×5×=（+）×4= 81÷=﹣=×10= 5.5+12.4+4.5= 4﹣（0.6+1.9）= 1.9×4×0.5= 0.77+0.33=
直接写出下列各题的结果 152﹣68= 5.2+8= 1.3×40%= 0.45÷1.5===43= 8.5b+5b=
×
= 8﹣1
= 3
+7.6=
÷
= 200×75%=
÷6+
=
﹣（2
）=
=
=
= 48÷
=
÷
=
×
= 5﹣
=
×
=
+
= 1÷
=
+3÷
=
×5×
=（
+
）×4= 81÷
=
﹣
=
×10= 5.5+12.4+4.5= 4﹣（0.6+1.9）=+3÷=×5×=（+）×4= 81÷=﹣=×10= 5.5+12.4+4.5= 4﹣（0.6+1.9）=
=
=43= 8.5b+5b=
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