1、四年级数学四则运算与简便计算 四年级数学四则运算与简便计 算 四则运算与简便计算练习题 一、计算下面各题 121 111 37 (120 103) 50 (284+16)(512-820818) 120-36418+35 (58+37)(64-95) 45 20 3 (136+64)(65-34523) 85+14(14+20826) (121 111 37) 5 280 650 13 1000 (280 650 13) 760 10 38 984687(36060) 508345(15261521) 121 111 37 (121 111 37) 5 280 650 13 45 20 3 1
2、000 (280 650 13) (95 19 5 )74 (120 103) 50 760 10 38 (270 180)(30 15) 707 35 20 (95 19 5 )74 1996-96274 10000-(5966)64 594045(798-616) (270 180)(30 15) (31540-364)7 125208(12111) (2010-906)(65+15) 707 35 20 5016040 (58+370)(64-45) 120-14418+35 347+452-416052 (58+37)(64-95) 95(64-45) 178-14556+42 420
3、+580-642128 812-700(9+3111) (12485)1226 (5921)(968) 32513(266-250) 140-905+678 分)24二、面各题,怎样简便就怎样计算。( 49102249 125768 10332 410008125 6756193207 58248(8578) 840287018 794198 6825 72125 973603360 38498254 724+2624+724 三、用简便方法计算(12分) 756193207 10192 4800254 88125 42850+7150+50 98134 (加减法接近整百数的简算) 18498
4、 695202 864199 738301 (加法交换律和结合律的运用) 380476120 (569468)(432131) (减法的简算,重点:运算符号变化的处理) 25614753 37312929 89(8974) 456(25636) (乘法交换律和结合律的运用,重点:一个因数分成两个因数的处理) 28425 1253225 972125 (乘法接近整百数的简算) 10235 9842 (乘法分配律的运用) 26396126 3569569 7810178 5276477676 1345613445134 995555 (乘法分配律的综合运用) 1999 999 999)440(23
5、48 25425248 四、综合练习: 158+262+138 375+219+381+225 50012471021232 32(25+125) (181+2564)+2719 378+44+114+242+222 276+228+353+219 178101178 (375+1034)+(966+125) (2130+783+270)+1017 99+999+9999+99999 88125 7755(2187+755) 2214+638+286 30657381065 899+344 10276 2357183317357 23651086214 497299 2370+1995 25(
6、24+16) 3999+498 1883398 1225 7524 2532125 7942+79+7957 138254 (13125)(38) (12+24+80)50 70425 17899+178 2532125 32(25+125) 88125 10276 5898 5898 178101178 8436+6484 7599+275 8100475 16800120 83102832 50(344)3 25(24+16) 70425 7300254 98199 123181233+85123 17899+178 7524 138254 7942+79+7957 7300254 810
7、0475 (13125)(38) 16800120 301002100 32000400 50 700 (12+24+80) 49700 124824 315015 480025 21500125 123181233+85123 158+262+138 375+219+381+225 50012471021232 (181+2564)+2719 (2130+783+270)+1017 378+44+114+242+222 276+228+353+219 (375+1034)+(966+125) 99+999+9999+99999 7755(2187+755) 2214+638+286 3065
8、7381065 899+344 2357183317357 23651086214 497299 2370+1995 3999+498 50(344)3 1883398 1225 8436+6484 7599+275 83102832 98199 五、脱式计算: 128+353 700-1253 3305+467 1049-728 145-1502+23 98463 185+5223 483+2402 892+86 4505+296 7848+1054 2529(11-4) 5604-6307 (210+630)7 522(328-319)+42 (42+18)(56-26) 1626-968
9、 305(400-395)-278 1495+5204 900(153) 58(64)29 3+(289-198)2 736297 953-1805 648+78 22 (439+725)68 3889-6684 )5+340( )17100-51( 4255-264 (135+65)(15-7) (3715-55)8 (4455+172)18 300-(76+403) (279+3215)64 (488+325)12 45+555-20 12(280-804) 400-2255+145 156+187179 32513(266-250) (242+556)148 (105+24)153 17
10、5+28040-25 (205-101+152)8 (160+880) 20 550+2306231 400025-1312 六、简便运算 199999 19999 1999 199 19 9999 2222 3333 3334 56 3+56 27+56 96-56 57+56 98766 98768 98765 98769 七、小数加减混合运算题 25.6-(0.23+5.6)-1.77 13.75-(4.75+6.48) 7.83+2.34-0.83+6.66 3.82+2.9+0.18+9.1 25.48-(9.4-0.52) 35.6-1.8-15.6-7.2 5.93+0.19+2
11、.81 7.3+2.7-7.3+2.7 48.4+2.78+51.6-0.78 23.4+0.8-13.4-7.2 4.8+8.63+5.2+0.37 3.07-0.38-1.62 1.27+3.9+0.73+15.1 5.84-1.8-3.2 132.44-(58.74+19.44) 7.5+4.8-6.5 3.25+2.76+1.75 13.75-(3.75+6.48) 7.14-0.53-2.47 13.45-4.68+2.55 47.8-7.45+8.2 36.8-4.5+6.98 49.8-9.6+8.8 15.2-6.8-3.45 1.76+0.65+3.24 0.134+2.66+0.8 7.5+4.9-6.3 3.45+1.79+0.65 4.85+8.63+0.37 1.76+3.44+0.35 36.54-1.76-8.66 8-2.45-1.02 23.4+3.4-0.23 6.02+3.6+1.98 3.07-0.38-1.62 7.5+4.9-6.5 36.8-3.9-6.88 3.285+1.79+0.59 23.4-0.8+13.4 32+4.9-8.6 1.29+3.7+2.71 5.93+0.49+2.06 9-2.45-1.65 21+0.56+11.3 64.89-7.88-13.6
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