1、四则运算 简便计算(4)乘除(1)4545 (2)23 52 (3)2594 (4)8(12513) (5)(250125)(48) (6)88125 (7)72125 (8)1256425 (9)4212585 (10)25488125(11)(12+50)40 (12)125(40-4) (13) 76103 (14)18125 (15)2544 (16)4225 (17)999 (18)9978 (19)4537+3755 (20)2821+2879 (21)1723-237 (22) 3846+6438 (23)9932+32 (24) 46+4659 (25)1672+1673+16
2、75 (26)398+639-394 (27)28225-2225-6225 (28)(42+25)125+(18+15)125 (29)2324+2542+2718+2581 (30)9922+3334 (31)36049 (32) 25052 (33)600125 (34)80058 (35)480548 (36)240512(37)42035 (38)240025 (39)780012 (40)9604648 (41)9900012111 (42)3702381234 (43)640(164) (44)1000(1254)参考答案(1)4545 (2)23 52 (3)2594 =45(
3、45) =23(52) =2549=900 =230 =900(4)8(12513) (5)(250125)(48) (6)88125 =812513 =1258(2504) =812511=13000 =1000000 =11000(7)72125 (8)1256425 (9)4212585 =81259 =1258(258) =425(1258)=9000 =200000 = 210000(10)25488125=100(8125) 11=1100000 (11)(12+50)40 (12)125(40-4) (13)76103 =1240+5040 =12540-1254 =76(100
4、+3)=2480 =4500 =76100+763 =7828 (14)18125 (15)2544 (16)4225 (17)999 =(10+8)125 =25411 =22521 =891=10125+8125=2250 =1100 =1050(18)9978 =(100-1) 78=10078-178 =7722(19)4537+3755 (20)2821+2879 (21)1723-237 =37+(45+55) =28(21+79) =23(17-7)=3700 =2800 =230(22)3846+6438 (23)9932+32 (24)46+4659 =38(46+64) =
5、32(99+1) = 46(59+1)=38110 =3200 =2760=38(100+10)=38100+3810=4180(25)1672+1673+1675 (26)398+639-394 =167(2+3+5) =39(8+6-4)=1670 =390(27)28225-2225-6225 (28)(42+25)125+(18+15)125 =225(28-2-6) =125(42+18+25+15)=4500 =12500(29)2324+2542+2718+2581 (30)9922+3334 =8(23+25+27) =33(66+34)=600 =3300(31)36049
6、(32)25052 (33)600125 =360(49) = 250(52) =600(125)=10 =25 =10(34)80058 (35)480548 (36)240512=80085 =480485 =240125=20 =2 =4(37) 42035 (38)240025 (39)780012 =42075 =240055 =780062=12 =96 =650(40)9604648 (41)9900012111 (42) 3702381234 =9604846 =99000(12111) =12343381234=920 =9000 =114 、 (43)640(164) (44)1000(1254)=640164 =10001254=160 =32