人教版小學(xué)數(shù)學(xué)四年級(jí)下冊(cè)第六單元專項(xiàng)訓(xùn)練一《脫式計(jì)算》班級(jí)：姓名：.怎樣簡(jiǎn)便怎樣算。20.7+4.56-3.9815.2+0.9+0.18.15-2.85-1.1519.92+4.8-9.9248.67-(5.67+0.9)7.5+2.5-7.5+2.5.脫式計(jì)算。3.5-(15.6-2.7)56.4+(12.6-0.5).用簡(jiǎn)便方法計(jì)算下列各題。24.56+1.29+5.44+3.71 10.37-5.17-2.83 45.68-(7.84+8.16)1.83+2.51-0.8336.75+(4.25-1.8)2.72+1.88-1.72+2.124．計(jì)算下面各題，怎樣簡(jiǎn)便就怎樣計(jì)算。3.56+26.8+6.44 10.68+82.9-6.68 15.37-(7.45-2.37)52.17-(34.9+12.17) 3.08+7.78-2.08+7.78 20.05-2.7+39.5-6.35．計(jì)算下面各題，怎樣簡(jiǎn)便就怎樣計(jì)算。12.78-5.6+4.4 18.17-2.9-3.1 4.04-3.6+4.9620.75-(6.98+4.75) 9.85+3.7-9.85+3.7 14.83-(9.83-7.92)6．計(jì)算下面各題，怎樣簡(jiǎn)便就怎樣計(jì)算。31.8－2.65－3.352.8＋0.51＋0.49＋7.24.08－3.8＋2.677．計(jì)算下面各題，怎樣簡(jiǎn)便就怎樣計(jì)算。6.3＋10.5＋0.7 50.5－6.64－3.364.8＋6.05＋2.2＋0.958.36＋（7.7－5.36） 31.97－（2.45＋4.2）17.85＋3.74－5.568．計(jì)算下列各題，能簡(jiǎn)算的要簡(jiǎn)算。27.3＋73.2＋72.7 43.25－10.4－3.2524.6－3.98＋5.4－6.029．怎樣簡(jiǎn)便就怎樣計(jì)算。8.68＋5.75＋1.32 4.78－0.94－0.06 7.38－(5.38＋1.3) 1.9＋9.09＋1.9110．計(jì)算下面各題，怎樣簡(jiǎn)便就怎樣計(jì)算。8.6+15.65+1.419.32－5.56－3.4437.6－(7.6+3.25)5.49+2.68－3.496.27+3.83+1.738.4+3.5－8.4+3.5參考答案：1．21.28；16.2；4.1514.8；42.1；52．50.6；68.53．35；2.37；29.683.51；39.2；54．36.8；86.9；10.29；5.1；16.56；50.555．11.58；12.17；5.4；9.02；7.4；12.926．35.98；14.9；45.925.8；11；2.957．17.5；40.5；14；10.7；25.32；16.038．173.2；29.6；