五年级数学简便计算练习题

1、简便计算（1）1.25 X 32X0.253.8 X0.995.32 +7.93 +4.682.5 X 0.39 X 0.432.1 8.3 1.712.39-(5.18 + 2.39)(25 +2.5 + 0.25) X41.8X 3.5 +2.5 X 1.812.5 X8.86.8 X3.6 +2.68 X 641.31 X12.5 X8X23.6 X1.2 +3.6 X1.22简便计算（2）4.6 X 99+4.61.25 X2.5 X ( 80X4)4.6 X 47+4.6 X54 -4.67.68 +2.5 +0.40.45 X 72+45X0.18+4.57.5 X 101-7.5

2、4.27.8+2.24.20.87X 3.36+4.64 X 0.875.5 X 9912.5 X0.4 X2.5 X89.5 X 1010.125 X 72简便计算（3）4.08 X 0.25490X0.355.28 X9912.5X 4.12 X 0.85.7 X 10.149 X 0.125 X80.4 X63X 2.50.5 X 7.6 X200.34 X 1014.86 X994.91018.75 X 11-8.759.92120.68101简便计算(4)3.26 X 5.7-3.26 X 0.755.6 X 99+55.61.25213 0.86.13.6+3.63.94.7599

3、+4.752.73991.22.5+0.82.51010.450.254.7840.652027.28.4+2.88.40.78984.80.251.51050.32.50.4简便计算(5)56X 1.25 1.25+4.6+0.751.6X 7.5 X 1.2549X 0.125 X 80.4 X 63X2.50.5 X 7.6 X 209.6 X 100.142 X 10.29.8+0.5 +228.4 X 99+28.40.94X 2.5-0.9 X 2.54X0.8X12.5X2.53.6 X 1010.125720.2539+0.25简便计算（6）X 99+1.5810 + 0.2

4、+2.514.5X 1021.25 X 3,2 X 0.253.2 X 0.82+3.2 X 1,181.583.05 +0.25 +44.25X 0.4 +4.25 X 0.4X 1.7+1.35 X 1.7X 0.38 X 8012.15-3.83+0.85-6.172.653.55 X0.4 +3.55 X 0.40.12518.6-18.6 X0.53.583.6+6.43.5820-X=9解方程（ 1）X-1.8=415-X=22.1 +X=3X+ 7=0.31.6X=6.46X-35=133X-12X6=6(5X-12)8=24(100-3X) +2=86X+3=94X-2=105

5、X-39=5618+5X=218X-414=07X 3=8.1943-X=386.3X=8解方程(3)9X+X=07(X-20)=1406.7X-60.3=6.74(6X+3)=602X+23 X 4=134(3X-4) X 5=42X+1.5X=17.58X-3X=1053X+X+6=263X+6=182X-7.5=8.516+8X=404X-3 X 9=292(X-2.6)=85(X+1.5)=17.58(X-6.2)=41.6(X-3)+ 2=7.513.2X+9X=33.3解方程(4)8X-3X=1055.4X+X=12.8X-0.36X=16X+4.8=7.2X-6.5=3.28=0

6、.442X+25X=13413(X+5)=1695X+7=426X+18=483(X+2.1)=10.512X-9X=8.73.8+X=6.3X-7.9=2.62.5X=14X+ 3=1.23.4X-48=26.82X-97=34.2解方程(5)6X-2X=200.5+7X=183X-68=0X+ 4.2=23.6X-X=3.252(X-3)=5.8X+ 1.44=0.43.85+1.5X=6.16X-0.9=4.57.8X+2.4X=20.42(X+1)=66(X-1.5)=154X-12 X 3=100(X-5)3=7X-0.28X=3.60.3 X 4-2X=0.24(X+6)=36X-0.8X=1.2解方程(6)8X+19=512.7X-14=21.1X-0.38X=1.245.3X-2X=1.324(X+4.5)=205X-7.3=7.73.6X+8.5=22.97X+4 X 3.5=24.55X+28=486X-12=3045-3X=2454-X=247X=49126+X=423.5-X=2.51.8 +X=29X=92719.4-X=7列方程并求方程的解2.X9 倍减去 5, 等于 491.X 的 7倍比 52 多 25。3.X 加上 26 等于 54。4.X 与 5 的积是 855.X 与 2.3 的差是 4.7 。6.X 除以 12 等于 4