1、1、计算:(9)34+1911; (10)8+121623; (11)4.2+5.78.4+10; (12)6.13.74.9+1 .8; (13) +1; (14) + + ; 312416532(15)216157+348+512678; (16)81.26293.8+8.74+111;(17)4 +1 17 2 ; (18)2.25+3 12 8 ; 3214187431253(19)12(18)+(7)15; (20)4028(19)+(24) (32);(21)4.7(8.9)7.5+(6); (22) +( )( ) ;3261421(23)4 ; (24)5 10.8; (25)
2、0.120.54 ; 31721 23(26)4.72+16.425.28 (27) ; (28) ;)( 7523)( 431(29) ; (30) (31)2317(7)+(16)432(1)51(2.)((32) +( )1+ (33)(26 .54)+(6.4)18.54+6.432513(34)(4 )( 5 )+( 4 )3 (35)(6.1)(4.3)(2.1)5.7872181(36) 3.44 .78.35; (37) (38)532712175.415.0(39)0.36+ ( 7.4)+0 .3+(0.6)+0.64; (40 )9+(7)+10+(3)+(9 );答案:
3、(1)5 (2)3 (3)15 (4)4 (5)8 (6)2 (7)11(8)1 (9)1 (10)352 (11) 3.1 (12)0.7 (13) (14) 34(15)191 (16)92.8 (17)22 (18)14 (19) 8 (20)41 (21)0.1 87249(22)1 (23)3 (24)5.3 (25)0.57 (26)6.42 (27) ; (28)2 7;5(29) ; (30)0 (31)3 (32) (33)45.08 (34)6 (35)2.6 65143(36) 7.05; (37) ; (38)3.5 (39)6.7; (40)0;12答案:(1)5 (
4、2)3 (3)15 (4)4 (5)8 (6)2 (7)11(8)1 (9)1 (10)352 (11) 3.1 (12)0.7 (13) (14) 34(15)191 (16)92.8 (17)22 (18)14 (19) 8 (20)41 (21)0.1 87249(22)1 (23)3 (24)5.3 (25)0.57 (26)6.42 (27) ; (28)2 7;5(29) ; (30)0 (31)3 (32) (33)45.08 (34)6 (35)2.6 65143(36) 7.05; (37) ; (38)3.5 (39)6.7; (40)0;12答案:(1)5 (2)3 (3
5、)15 (4)4 (5)8 (6)2 (7)11(8)1 (9)1 (10)352 (11) 3.1 (12)0.7 (13) (14) 34(15)191 (16)92.8 (17)22 (18)14 (19) 8 (20)41 (21)0.1 87249(22)1 (23)3 (24)5.3 (25)0.57 (26)6.42 (27) ; (28)2 7;5(29) ; (30)0 (31)3 (32) (33)45.08 (34)6 (35)2.6 65143(36) 7.05; (37) ; (38)3.5 (39)6.7; (40)0;12答案:(1)5 (2)3 (3)15 (4)4 (5)8 (6)2 (7)11 (8)1 (9)1 (10)352 (11) 3.1 (12)0.7 (13) (14) (15)191 (16)92.8 (17)22 324187(18)14 (19) 8 (20)41 (21)0.1 (22)1 (23)3 (24)5.3 (25)0.57 249 2(26)6.42 (27) ; (28 ) ;(29) ; ( 30)0 (31)3 (32) 72565(33)45.08 (34)6 (35)2.6 (36) 7.05; (37) ; (38)3.5 (39)6.7; 3(40)0;