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练习四十三:接下列方程 练习四十六:计算下列各题 练习四十九:计算下列各题
练习五十三:直接写出得数 练习五十四:直接写出得数 (1)3x+2x=6.25 (2)0.7x+0.2x=3.6 (3)8x-35=5 (4)8x+80=400 (5)x÷12=0.25 (6)6x+3.5x=19 (7)5x+32.9=45.4 (8)x-0.75x=21 (9)0.3x=42 (10)5x-x=9.6 (11)1.25x-2.5=10 (12)x+0.9x=76 练习四十四:接下列方程 (1)3x÷2=9 (2)24x÷2=36 (3)3(x+3) ÷2=6 (4)3x-4+5x=24 (5)45+4x=5x (6)17x+34×2=102 (7)13x+26=65 (8)7x+3=3x+19 (9)4x+128=8x+116 (10)84÷(2x-6)=4 (11)6(x+4)+2=26 (12)7(2x-3)+15=2x 练习四十五:根据加法、乘法运算定律,在( )里填适的数 (1)46+54=( )+46 (2)37×86=86×( ) (3)195+55+45=195+[( )+( )] (4)34+59+66=[( )+( )]+59 (5)(56+21)+79=56+[( )+( )] (6)25×(4×46)=[( )×4] ×( ) (7)25×13×4=13×[( ) ×( )] (8)24×125=8×( )×[( )×( )] (9)18×35=9×[ ( ) ×( ) ] (10)695÷2÷5=695÷[( )×( )] (11)[( )×31]×8=[125×( )]×31 (12)125×[40+( )]=125×40+125×8 (1)25-3.98-4.02-7 (2)24.36-7.73-2.27 (3)7.5×8.4+8.4×2.5 (4)(0.125×8-0.5)×5 (5)15.36+0.07+3.93 (6)7.01-2.625-3.375 (7)4.23÷0.125 (8)18.9-(5.9+7.3) (9)0.25×125×32 (10)5.6×8-0.6×8 (11)0.25×125×32 (12)5.6×8-0.6×8 练习四十七:计算下列各题 (1)64-5.75-4.25 (2)0.25×87×4 (3)1.25×(8×0.76) (4)2.37+3.5+2.63+6.5 (5)0.75×10.2 (6)17.83-7.5-7.83-0.5 (7)9.97-2.76-3.24 (8)4.7×0.99 (9)5.38+88.2-2.38+1.8 (10)1.6÷1.25 (11)15.6÷24 (12)0.9+0.99+0.999 练习四十八:计算下列各 (1)22.69+2.3-2.69 (2)0.08×98.5×12.5 (3)1.25×4.8 (4)3.29×4.6+3.29×4.4 (5)12.5×0.25×32 (6)7.51+4.56+1.49 (7)52.36-5.23-3.77-2.63 (8)808×0.125 (9)(28.9×0.025)×4 (10)9.9×4.8 (11)99.9×0.7+11.1×0.7 (12)1.25×16+12.5×8.4 (1)3.2×99+3.2
(2)78.5+3.3-78.5+3.3 (3)0.25×32×12.5 (4)4.04×250
(5)45.55-(16.82-14.45) (6)8.6×0.9+1.4×0.9-0.9 (7)4.8×39+61×3.8 (8)34.52-17.77-12.23 (9)489×10.1-48.9
(10)[6.1-(4.6+0.8)] ×0.4 (11)4.57+3.17+3.43+5.83 (12)1.27+5.9+4.1+6.73 练习五十二:直接写出得数 (1)0.45÷9= (2)0.4+6=
(3)0.25×40== (4)5-0.5= (5)1.8÷0.2= (6)0.5×5= (7)8÷0.4= (8)5.2÷0.1= (9)6.5-3= (10)6.36÷6= (11)12×0.5= (12)0.1×0.12= (13)2÷0.4= (14)1÷20= (15)1-0.07= (16)1.06+0.4= (17)0.3÷6= (18)10.5-8= (19)1.8÷0.3= (20)2×0.25= (21)0.25+1.75= (22)50×0.4= (23)2.4×0.5= (24)4÷5= (25)6.8+2= (26)6×1.5= (27)0.72+0.18= (1)0.12+0.28= (2)10-0.05= (3)1.1+7.9= (4)2.4-0.24= (5)1.4×0.3= (6)0.21×0.6= (7)0.36÷2= (8)5.6÷0.7= (9)0.6÷0.15= (10)3.2÷0.8= (11)0.05×24= (12)1.6×0.25= (13)5÷2.5= (14)24÷0.08= (15)0.1÷0.01= (16)0.88÷11= (17)9.6÷4= (18)0.5÷25= (19)2.8÷0.7= (20)3.6+2.8+0.4= (21)2.4+10.9+7.6= (22)2.5×8×0.4= (23)1.8÷(2.5×4)= (24)0.48÷0.2+7.6= (25)1-0.2×0.5= (26)4.5-4.5÷1.5= (27)(10.2-8.2)÷0.2= (28)2.5×(0.4+0.6)= (29)2.5×0.4+2.5×0.6= (30)6.4×(2.5+2.5)= (31)0.8÷0.8+0.8= (32)(1.2+3.8)×2= (33)1.05×2+5=
(34)5×0.2÷5×0.2= (35)0.21×3+0.42=
(36)0.71÷(4.4-3.4)= (37)5.6÷0.2÷100= (38)12.9-(6.4+2.9)=
(1)0.54÷9= (2)0.8+2= (3)0.35×5= (4) 5-1.2= (5)5.2÷0.1= (6)0.1×20= (7)0.5×12= (8)0.6×15= (9)1.2×9= (10)1.6×5= (11)2.5×40= (12)1.2×5= (13)5×1.4= (14)7.5×2=
(15)0.5+1.4×5=
(16)2.4÷(0.4×0.2)= (17)0.9÷1.5×2= (18)2.5-1.5÷1.5= (19)8.4÷(1.4×5)= (20)2.4-1.6÷2= (21)2.5×4+0.2= (22)0.45÷5×0.4= (23)0.75+0.25×3= (24)0.8×2.5×2= (25)3.2-1.35-0.65= (26)5×1.2+0.5= (27)2.7+0.3×0.5= (28)1.3-1.3×0.5= (29)2.4-2.4÷1.2= (30)
310?910?
(31)59?79?
(32)712?1112? (33)1013?413?
(34)9716?16?
练习五十五:直接写出得数 练习五十六:直接写出得数 练习五十七:直接写出得数 练习五十八:解下列方程练习六十: 练习六十一:解下列方程 (1)1.2×8= (2)5×32= (3)75-19= (4)2.4÷3= (5)45÷5= (6)75÷3= (7)366÷3= (8)0.48+0.52= (9)4.3-2.8= (10)0.6×0.4= (11)0.35÷7= (12)5.9÷59= (13)40-0.98= (14)1.9×3= (15)3.6+4= (16)1.2×100= (17)0.01×1000= (18)12-6÷0.6= (19)4×3.6+3.6= (20)2.7×101-2.7= (21)0÷3.2×2= (22)4.8×0×5= (23)0.125×8= (24)0.25×40= (25)0.48÷0.8= (26)6.21+0.79= (27)0÷51.2= (28)7.54×0.1= (29)1.5-0.15=
(30)5×0.2÷5×0.2= (31)1.05×2+0.5= (32)0.72÷0.36÷0.1= (33)8.45÷0.01=
(34)0.71÷(4.4-3.4)= (35)0.21×3+0.42= (36)1.5×0.5×2= (37)6×4×0.25= (38)4×1.3×5= (1)0.34+0.64= (2)1.28+0.32= (3)5.4+0.6= (4)4.5+1.5= (5)1-0.32= (6)1-0.14= (7)1.11-0.21= (8)2.4-1.4= (9)10-0.1= (10)10-0.15= (11)4÷5= (12)3÷15= (13)1.08+0.2= (14)3.2×0.5= (15)2÷0.5= (16)6.5-0.6= (17)1.8÷0.3= (18)125÷1.25= (19)0.28+0.72= (20)7.3-2.8= (21)75÷0.5= (22)17÷0.17= (23)6.5×100= (24)0.43÷100= (25)0.346×100= (26)0.75+0.5×20= (27)7.5-7.5×02= (28)8-2÷5=
(29)2.7×0.125×8= (30)0.5-0.12+0.45= (31)5.54-0.54÷0.1= (32)1÷0.25-0.12= (33)2.8+1.2÷6= (34)4.3-1.2×2= (35)7.8-0.4-5.6= (36)1.02-0.94÷2= (37)0.32÷0.8×5= (38)0.65÷0.5=
(1)8.08-0.8= (2)1.2×4= (3)2.4-0.5= (4)8.5÷5= (5)2.5×4= (6)2÷0.1-2= (7)2.45×2= (8)0.68÷0.4= (9)100×7.82= (10)4.3+7.2= (11)7.5÷3= (12)10÷0.25= (13)0.125×0.8= (14)17.5-4.2= (15)1.8+3.4= (16)2.5×0.2= (17)1.7×40= (18)1.8×4= (19)1.6×0.8= (20)1.3×0.2= (21)7.5×0.2= (22)1.25×8= (23)11.1×0.9= (24)2.34×0.2= (25)
11313?13?
(26)0.5-0.5÷5= (27)7.4-2.3-2.7= (28)0.64÷0.8×0.3= (29)
11715?15?
(30)8.3÷10=
(31)1.6÷0.4-0.9= (32)0.25×16= (33)21.06÷0.01= (34)4.8+3.6+1.2= (35)3.14×2= (36)0.9×0.8÷4= (37)435?5?
(1)6x+3=9 (2)40-8x=16 (3)4x+3=39 (4)x-15=76 (5)12x+32=80 (6)3(x+14)-1=101 (7)15x+6x=168 (8)3x-34=56 (9)7x-6=5x+28 (10)(12-5x)×3=x+4 (11)8x-8×3=2x (12)12x+15×20=600 练习五十九:解下列方程 (1)6x+37=73 (2)124-4x=76 (3)330-2x=10 (4)63+19x=443 (5)126÷x=42 (6)4-8x=0.8 (7)6x+5=13.4 (8)3.6x÷2=2.16 (9)4x-1.6x=7.2 (10)0.4x+30=60 (11)3.5x+2.7=9.7 (12)5.7x-2.3x=34 练习六十:解下列方程 (1)x+4.6=8 (2)15+x=23.5 (3)2x+4.5=16.5 (4)4x=28.4 (5)3x+17.6=7x (6)2x+6.5=4x+4.3 (7)4.5x+22.5=31.5 (8)15x+7.5x-27=54 (9)12.6(x+3.2)÷6=21 (10)10.5x-6.6x=17.16 (11)16.8x-9.3x=6×0.25 (12)6x-13.7=4x+16.3 (1)9x=6x+18 (2)4(x-9)=16 (3)1.5x-5×1.2=0 (4)0.8x+1.3x=4.2 (5)0.45x+1.35=2.25 (6)2.5x+90×2.5=425 (7)5x+32=382 (8)x+5+x=43 (9)26x-18x+9.1=18.7 (10)17x-x+4.8=22.4 (11)0.5(x-6)+8.5=9 (12)6x+4.5x=52.5 练习六十二:解下列方程 (1)3.5-2x=0.5 (2)4x-8=20 (3)6x+5=13.4 (4)5x-2.4×5=8 (5)6.24-0.8x=4.84 (6)5x+0.5×3=8.5 (7)4x-4=4×6 (8)18(x-6)÷0.3=1.2 (9)2.5(x+0.4)×0.2=5 (10)15x-3x=0.48 (11)18.4x-44×0.3=5x (12)0.2(x+2.6)÷2=0.1 练习六十三:解下列方程 (1)2x-0.4=0.6 (2)(1+0.3)x=5.2 (3)8x+4.6=11.8 (4)15x+6x=84 (5)3(x+4)÷2=30 (6)0.8x+3.2=7.2 (7)38.4+1.5x=42 (8)7.5(9-x)÷3=12.5 (9)x+2x+100=370 (10)2(x+3)+16=36 (11)0.2×16+3x=4.1 (12)16.8x-9.3x=16×3
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