小学五年级数学口算精选800题
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0.9 X 0.4 X 10= 0.68 X 8X 1.25=
7.1 X 0.25 X 4= 16.4 X2.9+16.4 X7.1=
3.2X2.8+3.2 X7.2= 1/6 + 1/2 -1/6 =
7.5-(2.5+3.8)= (1.2＋8.8)X 0.4=
9- 0.25 - 4= 0.25 X3.97X 4=
50+ 160- 40= ( 58+370)-( 64-45 )=
120-144 - 18+35 = 347+45 X 2-4160- 52=
(58+37)-( 64-9 X 5)= 95 -( 64-45 )=
178-145 - 5X 6+42= 420+580-64 X21-28=
812-700 -( 9+31X 11)= ( 136+64)X( 65-345- 23)=
85+14X( 14+208- 26)= 1.2 X 2.5+0.8 X 2.5 =
8.9X1.25-0.9 X1.25 = 12.5 X7.4X0.8 =
9.9X6.4- (2.5+0.24 ) = 6.5 X 9.5+6.5 X 0.5 =
0.35X1.6+0.35 X3.4 = 6.72-3.28-1.72 =
0.45+6.37+4.55 = 4.8 X46+4.8X54 =
5.4+
6.9 X 3-(25-2.5 ) = 2 X 41846-620-380=
0.8+0.8 X 2.5 = 1.25 X3.6X8X2.5-12.5 X2.4 = 28X12.5-12.5 X20 = 23.65- (3.07+3.65 )=
1.65 X 99+1.65 = (4+0.4X0.25)8X7X1.25 =
27.85- (7.85+3.4 ) = 48 X1.25+50X1.25X0.2X8 =
7.8X9.9+0.78= (1010+309+4+681+6 )X 12=
3X 9146X 782X 6X 854 = 5.15 X7/8+6.1-0.60625=
120-36 X 4 - 18+35 = 284+16)X( 512-8208-18)=
(58+37)-( 64-9 X 5)= (6.8-6.8 X 0.55) - 8.5=
0.12 X 4.8 - 0.12 X 4.8= 6-1.6 - 4= 5.38+7.85-5.37=
(3.2 X 1.5+2.5 )- 1.6= 3.2 X (1.5+2.5 )-1.6=
7.2 - 0.8-1.2 X 5= 6-1.19 X 3-0.43=
6.5X (4.8-1.2 X4) = 0.68 X 1.9+0.32 X1.9=
10.15-10.75 X0.4-5.7= 5.8 X(3.87-0.13 )+4.2X3.74= 32.52- (6+9.728 - 3.2 ) X 2.5= [ (7.1-5.6 )X 0.9-1.15] -2.5= 12X 6-7.2-6= 5.4 - [2.6 X( 3.7-2.9 )+0.62]=
12X6-( 12-7.2 ) -6= 0.25 X3.97X4=
(1.2 ＋8.8 )X 0.4= 120-144 - 18+35
95x+94=1044 x=10
62x+77=6153 x=98
方程： 88x+43=8579 x=97 80x+17=1777 x=22
36x+58=2974 x=81 17x-37=609 x=38
13x+25=1247 x=94 88x+30=2758 x=31
89x-31=4063 x=46 80x+85=565 x=6
27x+40=445 x=15 49x+43=827 x=16
83x-90=1653 x=21
99x-98=6139 x=63
29x-35=545 x=20 97x+81=954 x=9 50x-99=3101 x=64 38x-15=2037 x=54
84x-56=4732 x=57
44x+23=1387 x=31
38x+45=2021 x=52
83x-38=4444 x=54 64x-67=2813 x=45
60x+83=3203 x=52 5x-96=94 x=38
21x+90=489 x=19
22x+23=2135 x=96 26x-61=2513 x=99
37x+28=509 x=13 9x+86=500 x=46
67x+39=5466 x=81 9x-48=744 x=88
92x+67=1079 x=11 43x-94=637 x=17
38x-69=2933 x=79 47x+64=1944 x=40
38x+38=1178 x=30
53x+65=1443 x=26
96x+95=3935 x=40 5x-67=48 x=23
21x-70=1988 x=98 46x-74=4112 x=91
72x+15=7071 x=98 74x-34=6700 x=91
83x-63=7656 x=93
23x-40=696 x=32
48x-92=1684 x=37 39x+52=2470 x=62
68x+91=4103 x=59
56x-86=2770 x=51