脱式计算，能简算的要简算×4× ×7+ 55×﹣32×0.125×32×2.5 99.9+0.12+0.1+0.88 9+99+999+9×．
直接写出得数． 0.8+99+0.8= 1÷5+=÷25%×= （﹣）×24= 5×÷5×=
口算． ①7.25+0.84=②=③1﹣0.62=④5÷5%=
18.7﹣3.375﹣6.625．
0.05+=
直接写出得数 ①= ②= ③0.1+99×0.1= ④= ⑤= ⑥=
×4×
×7+
﹣32×
．
=
÷25%×
=
﹣
=③1﹣0.62=④5÷5%=
=
=
=
=
=
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