第5周练习
说明:三四单元试卷100分不要做,99-90分做10道,89-80分做20道,79-70分做30道,69-60分做40道,60分以下50道。(做在自备本上)
下面各题怎样算简便就怎样算
7.5+4.9-6.5 8.44+(10.86-8.44) 3.6+1.98+6.02
2.7+5.42+0.58 8.17-(2.17+5.29) 17.59+0.46+0.05+9.54
26.85+4.26-3.85 5.08+(9.92-2.59) 64.8-2.64-14.8-4.36
6.43-(1.4-0.57) 5.1-(4.1+0.33) 2.6+7.3+17.4+2.7
16.8-5.3-4.7 8.28-(2.28+0.14) 10.6-7.91+3.4-2.09
8.56+8.29-4.56 15.76-8.76-0.89-0.11 35.8-(5.4+5.8)
60.1+28+39.9+72 78.6-0.32-3.68 5.5+9.18+0.82+4.5
6.52-3.44-2.56 3.24-(2.24-0.5) 9.96-(1.74+0.96)
5.1-0.45-1.55 17.6-3.45-7.6-6.55 0.78+2.45+1.22
3.18+5.67+4.82+4.33 24.5-3.74-0.26 4.8-3.62-0.38+0.2
6.32-(4.32+0.5) 0.47+12.9+9.53 2.17+3.6+7.83
16.8-(6.8-3.298) 3.25+1.79-0.79+0.75 23.4-0.8-13.4-5.2
7.5-2.86+(1.1-0.39) 14.26-(4.03+1.62) 7.53-(4-2.47)
0.65+1.26-0.65+1.26 14.5-2.3-4.5-3.7 12.76-5.3-2.7
16.42+3.72-6.42 25.62-0.83-0.62-9.17 4.56+2.61+5.44
8.27+2.2-1.27 15.62-2.7-2.3 3.77-(1.77-0.6)
5.27-3.9-0.1 1.29+3.7+2.71+6.3
