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1、脱式计算完毕时间:- ()(25010)(36) (2)104-204 = =(3) (-375)7009 (4) 30-(300-2)= = =()(150-7)(520) () 28+= = =(7) 29366 (8)2554= = =脱式计算完毕时间:- (1)(467-42)(35070) (2) 10-505= = =(3)3587 (4) 3-57= = =() (+7)(166) (6) 6250= = =(7)7515205 (8) 2(216) = 脱式计算完毕时间:- (1) 567+36 (2) 2-549 = =(3)1000+(10088) ()427366 = (
2、) 66 () 2526= = (7) 500(439) (8)64+(464-453)= = 脱式计算完毕时间:- ()(29)(568) (2)2400645 = (3)(15075)(25-20) (4) 2653= = =(5)6064 (6) 255+42= = =(7) 31149 ()3390-1095 = =脱式计算完毕时间:- (1)374+198 (2)295= = =(3) 189-42 () 60213 = =(5) 08 (6) (10-7)= = =(7)6+2 (8) 434+25= = =脱式计算完毕时间:- (1) 245 (2)8(910-720) (3)
3、29-366 (4)800 780= = =(5)57486 (6) 9(-68) = =(7) (72)(68) (8)1601608= = =脱式计算完毕时间:- () 255+26 (2) (2-17)= = =(3) (9465642)(35070) (4) 659-45= = =(5) 500(400-396) (6) 687+993= = =(7) 640+111 (8) 1602+3= = =脱式计算完毕时间:- () 25564 (2) 6081570= = =() 1281 ()8062= = =() 3311+4 (6) 32(326) = =(7)900(768) (8)
4、0083= = 脱式计算完毕时间:- (1) +2 () 1052= = =(3) 765-(56+4530) (4) 4+95= = =()427366 ()64+45= = () (870-7)+09 (8) 22+69= = 脱式计算完毕时间:- (1) 96049 (2)309+66= = (3) (1118) ()60(2-1)= = =(5)358 (6) 5 98= = (7)65+774 (8) 27 3 9= = =脱式计算完毕时间:- () 10-04 (2) 6700+28 = =(3) 214-9 (4) 50+250= = =(5) 6+456 (6)80+2= = =()725 (8) 8044= = 脱式计算完毕时间:- (1)7515+05