5.6+2.8= 3.2×0.4= 6÷100= 740﹣250= 15.28﹣（5.28+5.8）=18.4÷0.02= 2.36+1.44= 0.46×1000= 3.02×0.8= 1.56×3.5+0.5×1.56=
．
（1）= （2）46×101= （3）= （4）0.2÷10%= （5）915﹣519= （6）= （7）= （8）42÷0.25=
计算，能简算则简算.++ 1﹣﹣++﹣（﹣）++﹣+﹣．
直接写出得数． 3﹣=﹣÷+= 49×9+49= 3.72+22.8=×=÷= 36×=﹣= 0.125×1.6×0.8=
== 0.25×99+0.25======= 8×3.2+8×6.8=
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= 0.125×1.6×0.8=
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= 0.25×99+0.25=
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= 8×3.2+8×6.8=