小學(xué)五年級小數(shù)加減乘除混合運(yùn)算練習(xí)題

1、小數(shù)混合運(yùn)算專項(xiàng)訓(xùn)練1、解方程。(1) 5x=450 (2)12 (6-x) =42(3) 1.2x6+4x = 12 (4)8.5x-x=22.52、用簡易方法計(jì)算。(1) 0.25x3.2x12.5(3) 0.25x443、用遞等式計(jì)算。(1) 2.6+1.4X1.5-1.5(3) 2.6+2.4X (1.4-1.05)30.8引14-(9.85+1.07)60-2.8810.43-0.24x3.528-(3.4+1.25x2.4)777x9+1111x3 (2) 36x10.1(4) 22.2x4+17.8x4(5) (37-3.64.8)4-12.5 (4) 15.616x (0.25

2、+1.25)(9.5+28.9)卜0.1820x(2.44-1.8)-0.4+0.152.55x7.1+2.45x7.10.8x15.5-(3.21+5.79)(31.8+3.2x4) - 531.5x44-(6+3)0.64x25x7.8+2.222.5+2.5-236.25+4.25x9.95180-705x6242.4-2.5x0.8671x15-9745.67x0.2-0.620.78+5.436+110. 3;4x8+9-l+320. 3x24-9+137.228-1.2x52.55x7.1+2.45x7.1(4121+2389)4-7469x12+149219.4x6.1x2.31

3、8.1x0.92+3.930.4x0.7x0.254. 8x 5+4+1+49. 9x54-6+54-614. 31x54-6-5616. 54-9x18-14x2735. 95+ (64-45)36. 178-1454-5x6+426.5x (4.8-1.2x4)28-(3.4+1.25x2.4)777x9+1111x3 (31.8+3.2x4)31.5x4X6+3)0.64x25x7.8+2.22+2.5+2.5+2194-64.84-1.8x0.936.724-4.25x9.95180-705x6244-2.4-2.5x0.8(4121+2389)7671x15- 974469x12+1

4、4925.67x0.2-0.620.4x0.7x0.250.78+5.436+1240x784- (154-115)2160: ( (83-79) xl8)28085x(95-1440:24)81432+(13x52 + 78)37.85-(947-599)+76x64405x(3213-3189)19.4x6.1x2.318.1x0.92+3.930.043x24+0.8754.07x0.86+9.121437x27 + 27x563(75- (12+18)15 + 840:24x5325+13x(266-250)58870X105 + 20x2)1437x27 + 27x563 (7.85

5、+6.4) x3036x(913-2764-23)192- (54 + 38) x6781432(13x52 + 78) (947-599)+ 76x6460 (9.5 + 28.9)+0.182.8810.43-0.24x3.50.8x (15.5-(3.21+5.79) (31.8 3.2x4)彳5194 64.84-1.8x0.936.724-4.25x9.93.416 (0.016x35)0.8x(10-6.76)-1.2(6.8-6.8x0.55H.50.12x 4.80.12x4.8 (58+37 ) +(64- 9x5)812-700:(9+31x11) 156x(17.7-7.

6、2)4-3 (3.2xl.5+2.5) +1.685+14x (14+208+26) 120-36x418+359.72x1.6-18.3054-73.2x (1.5+2.5)+1.6 (58+37) + (64-9x5) (6.8- 6.8x0.55)4-8.50.12x4.8-0.12x4.8 (3.2x1.5+2.5 ) 4-1.6120-36x44-18+3515-10.75x0.4- 5.7347+45x2-4160+52 (58+37) + (64-9x5) (7.1-5.6)xO.9-1.15 4-2.5 (3.2xl.5+2.5) +1.65.4引2.6x (3.7-2.9)+

7、0.6212x64- (12-7.2) -63.2x6+ (1.5+2.5) -rl.6 (32x1.5+2.5)4-1.6120-14418+35347+45x2-416052(58+37)-r(64-9x5)954- (64-45)3 / 7812-700+ (9+31x11)120-36x4-18+35(6.8-6.8x0.55)4-8.50.12x4.80.12x4.80.8x (15.5-(3.21+5.79)(31.8+3.2x4)4-531.5x4:(6+3)0.64x25x7.8+2.22:2.5+2.5+2194-64.81.8x0.936.72+4.25x9.95180-7

8、05x624+2.4-2.5x0.8(4121+2389)4-7671x15-974469x12+1492405x(3213-3189)0.8x(10-6.76)1.219.4x6.1x245.67x0.2-0.6218.1x0.92+3.9324+0.875x990.4x0.7x0.250.75x102100-56.2331.50 + 16040(58+370)(64-45)32.120-144-18+3533.347+45x2-41605234 (58+37)-?(64-9x5)35.95+ ( 64-45)36.178-145-5x6+42420+580-64x214-2837.812-

9、700(9+31x11)(136+64)x(65-345+23)38.85+14x (14+2084-26)120-36x4-18+35(58+37)-r (64-9x5)(6.8-6.8x0.55)4-8.50.12x4.80.12x4.8(3.2xl.5+2.5) 4-1.63.2x (1.5+2.5)4-1.65 / 731.50 + 16040(58+370)-r (64-45)32.120-144-18+3533.347+45x2-41605234 (58+37)4- (64-9x5)35.95+ ( 64-45)36.178-1455x6+42420+580-64x214-28812-700+ (9+31x11)(136+64) x (65-34523)(284+16)x(512-8208-M8)120-36x4-18+35(58+37) + (64-9x5)(6.8-6.8x0.55)4-8.50.12x 4.84-0.12x4.8(3.2xl.5+2.5) 4-1.6(23.2x (1.5+2.5) 4-1.645.6-1.64=5.38+7.85-5.37=46.70.8-1.2x5=47.6.5x (4.8-1.2x4)=0.68x1.9