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1、脱式计算完成时间:- (1)(250150)(306) (2) 104204= = =(3) (4870-3675)72009 (4) 300(300222)= = =(5) (15075)(2520) (6) 72895= = =(7) 729366 (8) 255164= = =脱式计算完成时间:- (1)(9467-5642)(35070) (2) 100505= = =(3) 35587 (4) 35357= = =(5) (17)(166) (6) 62500= = =(7)7515205 (8) 32(3216)= = =脱式计算完成时间:- (1) 567366 (2) 2145
2、49= = =(3) 1000(1000988) (4) 427366 = = =(5) 640604 (6) 5255426= = =(7) 500(400396) (8) 564+(464-453)= = =脱式计算完成时间:- (1) (729)(568) (2) 2400645= = =(3)(15075)(2520) (4) 126453= = =(5) 640604 (6) 5255426= = =(7) 331149 (8) 33901095= = =脱式计算完成时间:- (1) 374198 (2) 7295= = =(3) 1809-426 (4) 6021230= = =(
3、5) 60083 (6) 8(910-720)= = =(7) 364212 (8) 434255= = =脱式计算完成时间:- (1) 126453 (2) 8(910-720)= = =(3) 729366 (4) 800 7180= = =(5) 57486 (6) 900(71-68)= = =(7) (729)(568) (8) 16016080= = =脱式计算完成时间:- (1) 255426 (2) 60(23-17)= = =(3) (9467-5642)(35070) (4) 659-450= = =(5) 500(400396) (6) 6879993= = =(7) 7
4、60-540+1110 (8) 16002230= = =脱式计算完成时间:- (1) 255164 (2) 608+1570= = =(3) 1258100 (4) 8062= = =(5) 331149 (6) 32(3216)= = =(7) 900(71-68) (8) 60083= = =脱式计算完成时间:- (1) 364212 (2) 12052= = =(3) 7650-(546+4530) (4) 146+95= = =(5) 427366 (6) 648456= = =(7) (4870-3675)72009 (8) 202369= = =脱式计算完成时间:- (1) 96049 (2) 309066= = =(3) (111189)3 (4) 60(23-17)= = =(5) 35587 (6) 54 9 8= = =(7) 665+774 (8) 270 3 9= = =脱式计算完成时间:- (1) 104204 (2) 6700+728= = =(3) 214549 (4) 4505+1250= = =(5) 648456 (6) 807202= = =(7) 72895 (8) 81044= = =脱式计算完成时间:- (1) 7515205