四年级小数简便运算及答案

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,一、用简便方法计算下面各题：,48.7+5.6+11.3 43.21+98.76+56.79+1.24 5.48+3.99,6.3+15.4+0.09+3.7+14.6 56.8+22.8 34.65,0.99,0.97,34.5,2.98 45.7,10.4 57.3,27.8,=48.7+11.3+5.6,=60+5.6,=65.6,=(43.21+56.79)+(98.76+1.24),=100+100,=200,=5.48+(4,0.01),=5.48+4,0.01,=9.47,=(6.3+3.7)+(14.6+15.4)+0.09,=40+0.09,=40.09,=56.8+23,0.2,=79.8,0.2,=79.6,=34.65,1,1+(0.01+0.03),=32.65+0.04,=32.69,=34.5,3+0.02,=31.5+0.02,=31.52,=45.7,10,0.4,=35.7,0.4,=35.3,=57.3,28+0.2,=29.3+0.2,=29.5,67.68,7.3,2.7 3.65,1.28,0.37,1.77,19.826,1.173,5.248,3.405 130.8,35.9+5.9,23.97+0.9+6.8 23.9+6.78,3.9 31.61,21.27,1.61,=67.68,(,7.3+2.7,),=67.68,10,=57.68,=3.65,(,1.28+0.37,),1.77,=3.65,1.65,1.77,=0.23,=19.826,(,1.173+5.248+3.405,),=19.826,9.826,=10,=130. 8,(,35.9,5.9,),=130.8,30,=100.8,=23.97+1+,7,0.3,=31.97,0.3,=31.67,=23.9,3.9+6.78,=20+6.78,=26.78,=31.61,1.61,21.27,=30,21.27,=8.73,27.64,(5.79+1.64) 23.12,(10.12,3.67),20.65,(17.1,1.35) 32.75+(15.25,10.68),30.16,23.28+15.28 0.25,4.78,4 0.98,2.5,=27.64,1.64,5.79,=26,5.79,=20.21,=23.12,10.12+3.67,=13+3.67,=16.67,=20.65+1.35,17.1,=22,17.1,=4.9,=32.75+15.25,10.68,=48,10.68,=37.32,=30. 16,(,23.28,15.28,),=30.16,8,=22.16,=0.25,4,4.78,=1,4.78,=4.78,=,(,1,0.02,),2.5,=1,2.5,0.02,2.5,=2.5,0.05,=2.45,4.52,0.45+5.48,0.45 42,3.9,1.4,99+1.4,0.25,7,3.6 1.25,13,1.6 10.2,0.41,2.5,12.5,32 42,67+4.2,330 8.37,16,8,=0.25,7,(4,0.9,）,=0.25,4,7,0.9,=1,7,0.9,=6.3,=1.25,13,(8,0.2,）,=1.25,8,13,0.2,=10,13,0.2,=26,= (10+0.2,）,0.41,=10,0.41+0.2,0.41,=4.1+0.082,=4.182,=(4.52+5.48,）,0.45,=10,0.45,=4.5,= 42,(4,0.1,）,=42,4,42,0.1,=168,4.2,=163.8,=1.4,(99+1,）,=1.4,100,=140,=2.5,12.5,(8,4,）,=(2.5,4),(12.5,8),=10,100,=1000,=42,67+42,33,=42,(67+33,）,=42,100,=4200,=8.37,(16,8,）,=8.37,2,=16.74,28.7,0.35 310,2.5,4 11.2,9.6,2.4,560,(140,8) 5.6,7,4 91,0.125,2.38,4.1+5.8,2.38+0.238 28.7,1.6,28.7,=28.7,(0.7,0.5,）,=28.7,0.7,0.5,=41,0.5,=82,=310,(2.5,4,）,=310,10,=31,=11.2,(9.6,2.4,）,=11.2,4,=2.8,=560,140,8,=4,8,=32,=5.6,4,7,=1.4,7,=9.8,=(91,8),(0.125,8,）,=728,1,=728,=2.38,4.1+5.8,2.38+2.38,0.1,=2.38,(4.1+5.8+0.1,）,=2.38,10,=23.8,= 28.7,28.7,1.6,=1,1.6,=1.6,11,0.25,10,0.25 (80+5.6),8,=(11,10)0.25,=1,0.25,=4,=80,8+5.6,8,=10+0.7,=10.7,7.8,(1.001,0.26),0.26 3.5+17.8,99+14.3,100,9.5,0.98+9.5,2 28,11.11+99.99,8,=7.8,1.001,(0.26,0.26),=7.8,1.001,=7.8078,=(3.5+14.3)+17.8,99,=17.8,(1+99,）,=17.8,100,=1780,=100,0.98,9.5+9.5,2,=9.5,(98+2,）,=9.5,100,=950,=28,11.11+11.11,9,8,=28,11.11+11.11,(9,8),=11.11,(28+72,）,=11.11,100,=1111,7.6,18+2.3,2.4 1.62,8,(3.62,2.37),0.38,7.6+0.38,2.5+0.38,2 36,2.54+1.8,49.2,1994+199.4+19.94+1.994,=1.62,8,1.25,=1.62,(8,1.25,）,=1.62,10,=0.162,=0.38,7.6+0.38,0.4+0.38,2,=0.38,(7.6+0.4+2),=0.38,10,=3.8,=1.8,20,2.54+1.8,49.2,=1.8,(20,2.54)+1.8,49.2,=1.8,(50.8+49.2),=1.8,100,=180,=2000+200+20+2,6,0.6,0.06,0.006,=2222,6.666,=2215.334,=0.7,1+(2,2),0.7+0.7,3+2,0.7,=0.7,(1+4+3+2),=0.7,10,=7,0.7+2,1.4+2.1+2,0.7,(0.375,101,37.5),37.5 1.1,1.1,11,1.1,1.1,1.1,1999,19981998,1998,19991999,49.5,13.5,0.5,49.5+50.5,13,=0.375,(101,1),37.5,=0.375,100,37.5,=37.5,37.5,=1,=1.1,1.1,(11,1),1.1,=1.1,11,1.1,=1.1,(11,1),=11,=1999,1998,10001,1998,1999,10001,=0,999,999+1999,= 999,(1000,1)+1999,= 999,1000,1,999+1999,=999000,999+1999,=1000000,=49.5,(13.5,0.5)+50.5,13,=49.5,13+50.5,13,=(49.5+50.5),13,=1300,111,36+888,8,=111,36+111,8,8,=111,(36+64),=11100,98,98+97,97,98,97,97,96 88,0.125,1234,9876,1233,9877,98+97,96,95+94+93,92,91+,+6+5,4,3+2+1,=98,98,98,97+97,97,97,96,=98,(98,97)+97,(97,96),=98,1+97,1,=197,=(80+8),0.125,=80,0.125+8,0.125,=10+1,=11,=1233,9876+,1,9876,(,1233,9876,+,1233,1),=9876,1233,=8643,(8.4+8.4+8.4+8.4),2.5,=8.4,4,2.5,=8.4,(4,2.5),=84,= (98+97,96,95)+(94+93,92,91)+,+(6+5,4,3)+2+1,=4,(98,2)4,+2+1,=4,24+2+1,=99,0.9+0.99+0.999+0.9999 12.9,0.72+43.5,3.6,0.268,8.88,2.68,4.44 1.1+1.3+1.5+,+9.7+9.9,117.8,2.3,4.88,0.23 33333,33333,=(1+1+1+1),(0.1+0.01+0.001+0.0001),=4,0.1111,=3.8889,=(12.9,5),(0.72,5)+43.5,3.6,=64.5,3.6+43.5,3.6,=(64.5+43.5),3.6,=30,=(0.268,2.68),(8.88,4.44),=0.1,2,=0.2,=(1.1+9.9),2,45,=5.5,45,=247.5,=117.8,2.3,48.8,2.3,=(117.8,48.8),2.3,=69,2.3,=30,0.225,0.335+0.335,0.775+0.775,0.225,1992,27.5+1982,72.5 96,3.2,25,1.6,16+0.4,36 14,72+42,76,=(1982+10),27.5+1982,72.5,=1982,(27.5+72.5)+10,27.5,=198200+275,=198475,=96,(0.8,4,25),=96,80,=1.2,=0.4,4,16+0.4,36,=0.4,(4,16)+0.4,36,=0.4,(64+36),=40,=14,3,(72,3)+42,76,=42,24+42,76,=42,(24+76),=4200,50,96+57,4+7,66 399.6,9,1998,0.8,654321,123456,654322,123455,2003,200220002,2002,20032003,= 399.6,9,1998,2,0.4,= 399.6,9,399.6,4,= 399.6,5,=1998,