7125×2.5×3.21.25×9212.5×4×2.5×8×0.345.6-35.81+24.4-5.19100.47-(47%+50)45.6+35.81+24.4+54.192043-19819.8+86.43+20.2+57%9.27-(3.5-0.73)99.25-(25%-50)157+3.73+158+6.2761+53+52+6513.71+(4.375+9,29+5.625)9565+65+65+65+65+6525%×76-0。25×46+41×707.8×25+0.78×750345+298345-289三、计算:(计算时不能跳步计算)98×〔43-(167-41)〔11.4+8.6×(2.8-1.3)〕÷3(121+131)×6+7÷131÷〔(41-0.05)×85〕〔2-(35-1.5)×1712〕÷518〔43÷(41+85)〕÷(1-31)51÷〔(32+51)×131〕-410.64÷(211-4.5)+58÷0.4(589+221)÷〔56×(85-74)〕〔(43+51)÷41+52〕×250%〔16×41+(1-1413)〕÷7521×〔20-(29-41)÷25%〕〔1-(0.5+83)÷41×0.75〕1800×(1-99%)÷13×912019×(87+3÷8)1514÷〔(54+32)×1110〕-611110÷〔56×(73-83)〕×375〔43÷(41+85)〕÷(1-21)四、求未知数:ⅹ-76ⅹ=103ⅹ-38=112ⅹ:2=0.15:0.92.8+4ⅹ=19.2ⅹ-10%=186ⅹ-2.1×4=9.67ⅹ+4.2=5.62ⅹ÷5=1011.9ⅹ-0.6ⅹ=1.694×(0.8+ⅹ)=7.2(ⅹ-7)÷3=883:ⅹ=165:212ⅹ+30%ⅹ=9.20.25ⅹ-43×32=15ⅹ÷1.25=0.81-43ⅹ=53
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