1、五年级下数学分数加减法计算题一、计算下面各题,能简便计算的要简便计算。(1) (2) (3) ( ) (4) ( )56 79 16 58 25 14 1415 23 15 1920 45 740(5) ( ) (6) ( ) (7)6.12 2.88 (8) ( )76 710 13 118 23 14 37 47 2924 524 49(9) ( ) (10) (11) (12) 1811 711 38 79 310 29 1710 715 712 815 712 1583(13) +( ) (14) (15) - + - (16) + - 27 914 12 34 512 13 56 3
2、10 16 710 7914 13(17) - ( - ) (18) (19) (20) - +59 59 15 873145610343281(21)1+ (22) + (23) (24)0.85+ +1.15+ 4312712587481720725(25) (26) (27) + (28) 512 34 112 710 38 18 415 56 345 23 15(29)1 (30) (31) ( ) (32) ( ) 1718 118 517 451 23 710 37 310 8534 38(33) ( ) (34) (35) (36) 56 13 56 56 23 16 35962
3、375(37) (38) 6 (39) (40) 85352311 811 1114 35 314 25 52613(41) + - (42) ( ) (43) ( ) (44) + 7919 13 34 25 14 532141035(45) ( + ) (46) + ( + ) (47) ( + ) (48) + + +98613724358510361875(49) + - + (50) ( - ) (51) ( ) (52) 23 67 23 67 512 512 110 38 58 59 56 34 23(53)2 (54) + +( + ) (55) -( + ) (56) + -
4、 127311238 58 512 89 11879 79 112 1118(57)5 1 (58) (59) ( ) (60) -( )47 37 49 310 59 710 57 35 27 45 15 13(61) (62) (63) (64) 3 618535794534316515710 (2 3.9) 10 3 2.451.6 15 7 2.8 5 +6 +3 +2.7314 314 16 1120 16 15 23 310 13二、解方程。2x8.12518.125 3x x 1 2x -x=913495651541x ( ) x( ) +x= 143724783972x651x71322x-8 =18 x-9 =4 x+3 =5.3758743x43153x819251149-0.6+x=1 x3 = 3 6.753x= 18 3.25+4.5x=5 15.375+5X=2043201120 120 34 518 38