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08-09期末复习(计算部分)---练习题
班级: 姓名: 学号:
1、口算。(1)
1÷0.125= 7.2÷0.01= 2.14-0.9= 0.3÷0.3-0.3×0.3=
1.4×0.5= 33÷0.033= 0.05×0.8= 0.25×4÷0.25×4=
3.8+4.7= 3.07×1000= 72.8÷0.8= 5.38+7.85-5.38=
1.6-1.6÷4= 10-0.9×0.9= 1.2÷12= 0.3×(1.8+1.2) =
7×0.08= 1.5×0.03= 3.24-2.14= 4.2÷0.7-5.2=
(2)
0.75÷1.5= 0.6+0.45= 0.81÷0.27= 1-0.4×0.2=
0.04×1.5= 3.45-1.9= 0.045÷5= 1.25×(40+0.8)=
22.2-2= 0.18×3= 6.5×0.2= 0.6+0.4×0.25=
22.4+0.06= 50×0.1= 7.2÷0.8= 2.5+2.5÷2.5=
0.4×25= 0.36÷0.4= 1-0.06= 5.24+1.25×8=
(3)
0.15×4= 2.2×0.5= 5.67-5.67= 0.5+0.5÷0.1=
8.1×6= 2.1-1.2= 0.9÷0.3= 1-0.2÷0.2
0÷3.5= 1.21÷11= 1.4×0.5= (2.1-1.2) ×0.2
0.24÷0.6= 2.6÷0.2= 0.64+0.36= 9.6÷12=
10×0.52 6.3÷0.7= 2.5×0.4= 0.3÷0.6+0.5=
(4)
0.22×4= 0.9-0.52= 3.99×1= 0.001÷0.1=
0×3.52= 2.5÷5= 8.4÷7= 0.6×0.3=
0.34÷17= 2.5÷0.5= 8.4÷0.7= 0.3÷0.01=
0.34÷0.17= 30.4÷4= 1.2×6= 5.6÷0.9=
0.72÷0.6= 2.6÷1.3= 3.2×0.4= 0÷3.65=
2、估算。(1)
0.29×1.98≈ 25÷5.1≈ 32.1×0.4≈ 38×0.17≈
3.57÷0.53≈ 0.49×2.8≈ 819÷3.9≈ 5.9÷1.8≈
8.03×9.6≈ 48.1÷5.7≈ 0.31×5.9≈ 20.6÷4.01≈
3.02-1.98≈ 7.98×0.27≈ 14.4÷2.3≈ 5.42+0.61≈
1.09×0.8≈ 80.2÷3.9≈ 7.8×5.5≈ 25.2÷1.9≈
(2)
0.49×3.8≈ 59.9÷3.1≈ 3.01×5.3≈ 17.8÷2.8≈
0.79÷0.42≈ 5.05×6.9≈ 4.83÷0.21≈ 2.99×0.33≈
43.1×0.2≈ 0.96÷0.32≈ 6.93÷0.11≈ 4.9×2.01≈
4.03÷0.39≈ 0.51×0.78≈ 0.98÷0.02≈ 8.3×10.01≈
3.29×8.1≈ 0.503×0.39≈ 5.01÷2.51≈ 4.5÷0.39≈
3、竖式计算(验算第4列)
0.99÷1.8= 2.04×8.5= 4.692÷0.46= 0.6÷1.25=
5.06×0.75= 0.75÷5.4= 2.46÷12= 0.15×2.34=
3.6÷0.25= 0.37×60.5= 8.9÷3.7= 0.76×20.8=
3.2×4.06= 2.54÷11= 0.79×0.24= 3.69÷0.9=
(2)
45.24÷7.8= 0.52×0.7= 165.3÷0.57= 8.7×0.25=
2.3×0.14= 315÷0.21= 0.49×6.02= 3.07÷0.18=
24.6÷1.6= 3.6×0.015= 0.54÷3.6= 0.25÷3.6=
35.65÷4.6= 80÷32= 39÷0.13= 0.205×2.8=
(3)(第4横行结果保留两位小数)
22.2×3.7= 10.5÷0.75= 1÷0.25= 0.39×2.03=
1.89÷5.4= 20.4×0.48= 0.676÷5.2= 3.6÷0.25=
0.12×2.45= 9.62÷3.7= 2.87×3.05= 187.48÷21.8=
1.55÷3.9≈ 75÷0.23≈ 0.056×1.38≈ 67.27÷23≈
(4)
6.85×2.04= 26÷27= 4.81×0.45= 2.94÷1.8=
4.25×3.3= 3.35×0.14= 38÷2.5= 60.4÷2.5=
0.97÷0.25= 6.01×12.4= 48.8÷6.6= 0.045×0.76=
40.3×27.1= 51.2÷0.11= 2.4×15.4= 9.6÷0.48=
(5)
31.85÷9.5= 0.68×4.9= 0.35×47.2= 95.4÷4.5=
6.45×0.07= 24.61÷2.3= 90.2×2.7= 2.944÷4.6=
0.94×0.84= 4.532÷1.07= 98.4÷4.8= 6.71×30.5=
183.6÷4.5= 0.96×7.04= 31.96÷37.6= 2.08÷3.6=
4、计算下面各题,怎样算简便就怎样算。
50.8-(20+9.6÷0.4) 4.5×2.5 13.4+5.62+17.6+4.38
7.4×9.8-14.5 2.9×10.2 6.73×4.8+5.2×6.73
4.2×(6.18–3.03) + 6.3 0.25×3.2×4 3.8×6.9+3.8×2.1+3.8
0.6×[(5 - 0.68)÷1.2 ] 8.4÷0.6+8.4÷0.4 0.25×32×1.25
2.7÷4 + 6.3×0.25 12.5×9.8 2.4×0.25÷0.6
(6.02 + 2.8 )÷0.4 - 2.05 98×100.1 (70+0.42)÷7
15.02-6.8-(1.02+1.2 ) 100-32.5-67.5 (1.25+0.25)×4
(9.6+1.48÷3.7) ÷8 1÷0.1-0.1÷1 0.25×0.5×16
5.8÷[4×(1.34-0.14)] 36×10.1 67.8-(25.9+17.8)
3.2÷5.8÷0.16 7.05×23.7+7.05×76.3 1.25×0.5×0.8
10-(4.5-3.75+1.5) 320÷5÷0.4= 6.2×0.4—0.4×1.2
20.9+1.5÷(5.2-4.5) 6.9÷(3-0.3) 5.6+5.6×9=
3.2´5.8¸0.16 78.1-(14.5-5.5+18.1) 1.8×4.3+6.7×1.8-1.8
20.9+10.5¸(5.2-4.5) 50.8-(20+9.6¸0.4) 0.5×2÷0.5×2=
0.8×(4-3.38)×5 2.5×(4+0.4) 0.68×1.9+0.32×1.9
15.4÷[8×(6.34-4.59)] 2.5×4.4+2 8.7×2.6+6.4×8.7+8.7
7.9-0.98×1.5 25-4.2÷0.1 0.8÷0.8×0.5
20-3.1×6÷0.7 2.1×0.3÷2.1 0.8-0.8×0.5
1.6+8.4×1.5÷0.18 24÷4+56×0.25 0.9+0.1÷0.1
51.6÷[(3.4-1.25)×0.8] 12.81-(1.5+7.81) 11.2-1.93+0.8
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