小数混合运算专项练习(专项练习)-2023-2024学年六年级下册数学青岛版

2024-05-31
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小数混合运算专项练习二(含答案) 1. 6.3+3.7×2.8. 1. 2.15+8.73+1.27+7.85 1. 11.87﹣(8.2+1.87) 1. 5.42﹣3.87﹣1.13 1. 4.38﹣1.56+0.62﹣0.44 1. 0.4×270×2. 1. (40+1.25)×8 1. (12.5﹣0.05)×8 1. 2.6×8.5+8.5×7.4 1. 9.9×6.9﹣6.9×3.9 1. 5.6×99+5.6 1. 2.5×(1.9+1.9+1.9+1.9) 1. 7.2÷1.25÷8.  1. 52.4﹣(15+0.6)÷1.6 1. 9.87×99+9.87 1. 46.8÷0.9÷0.4 1. 5.5×17.3+6.7×5.5. 1. 99×4.2+4.2 1. 0.25×1.25×3.2 1. 6.4×14+15×6.4+6.4 1. (1.3+1.3×0.125×8)÷(80﹣77.4) 1. 4×(25+2.5+0.25)÷111 1. 6.25÷〔(17.2﹣3.6×4.5)÷0.32〕  1. 28.4×99+28.4 1. 0.94×2.5﹣0.45 1. 4×0.8×12.5×2.5 1. 17.5÷0.25×17+13. 1. 10.1×87 1. 2.3+3.19÷(22﹣19.8) 1. 1.25×7.2. 1. 9.1﹣1.2÷6﹣6.24 1. 7.3+12.8﹣3.8×2.3 1. (5.36+7.64)÷13×100 1. 7.575÷[(5.63﹣1.88)×0.2]. 1. 7.5﹣(5.5+1.24) 1. 0.26+15.68+9.74+2.32 1. 13.26+9.55﹣3.26 1. 6.1+3.9﹣6.1+3.9. 1. 31.7÷0.63(保留2位小数) 1. 2.4×1.5+3.6÷1.5 1. 0.32×0.25+0.08÷4 1. (9.6+1.48÷3.7)÷8 1. 5.8÷[4×(1.34﹣0.14)] 1. 5.4÷[0.51÷(1.2﹣1.03)]. (45)21.35﹣3.25﹣16.75 (46)33.02﹣(148.4﹣90.85)÷2.5 (47)32×2.5×0.125 (48)18.1+(3﹣0.299÷0.23)×1. (49)67﹣(2.98+0.67) (50)8×16﹣73.8×6 (51)(45+14)÷73+710. (52)13.7×0.125×8 (53)0.8×[13﹣(3.12+5.28)] (54)102×0.56 (55)1.53×1.7+0.47×1.7. (56)5.18+0.73+0.82 (57) 0.75×1.8÷1.5 (58) 12.5×7.1×0.8 (59) 6.12×99+6.12 (60) 8.6÷0.86+8×0.35 (61) 5.6×(18.5﹣8.5÷0.5)  (62) 0.125×4.78×80 (63) 2.8×3.6+1.4×2.8 (64) (0.4+40)×2.5 (65) 78.7﹣17.7×3.6 (66) 18÷[0.3×(8﹣6.5)] (67) 12.7+12.5+0.5. (68) 91÷2.6÷0.05= (69) 6.3×3.7+6.3×6.3= (70) (3.7+1.7×0.4)÷2.5= (71) 7.28+3.2÷2.5= (72) 0.74+0.9×7.4= (73) 7.8÷0.125÷0.8= (74) 37.5÷[0.3×(1.34﹣0.84)] (75) (2.5+27.75÷1.5)×1.6. (76) 6.21﹣3.8+2.2 (77) 6.03+3.7+2.97 (78) 17.43﹣6.57﹣2.43 (79) 20.47﹣(1.47+6.8) (80) 13.26+4.71+3.47+5.29 参考答案: (1)6.3+3.7×2.8, =6.3+10.36, =16.66. (2)2.15+8.73+1.27+7.85 =(2.15+7.85)+(8.73+1.27), =10+10, =20; (3)11.87﹣(8.2+1.87), =11.87﹣1.87﹣8.2, =10﹣8.2, =1.8; (4)5.42﹣3.87﹣1.13, =5.42﹣5, =0.42; (5)4.38﹣1.56+0.62﹣0.44, =(4.38+0.62)﹣(1.56+0.44), =5﹣2, =3; (6)0.4×270×2.5, =(0.4×2.5)×270, =270; (7)(40+1.25)×8, =40×8+1.25×8, =320+10, =330; (8)(12.5﹣0.05)×8, =12.5×8﹣0.05×8, =100﹣0.4, =99.6; (9)2.6×8.5+8.5×7.4, =(2.6+7.4)×8.5, =85; (10)9.9×6.9﹣6.9×3.9, =(9.9﹣3.9)×6.9, =6×6.9, =41.4; (11)5.6×99+5.6, =5.6×(99+1), =560; (12)2.5×(1.9+1.9+1.9+1.9), =2.5×4×1.9, =10×1.9, =19; (13)7.2÷1.25÷8, =7.2÷8÷1.25, =0.9÷1.25, =0.72. (14)52.4﹣(15+0.6)÷1.6, =52.4﹣15.6÷1.6, =52.4﹣9.75, =42.65; (15)9.87×99+9.87, =9.87×(99+1), =987; (16)46.8÷0.9÷0.4, =46.8÷(0.9×0.4), =46.8÷0.36, =130; (17)5.5×17.3+6.7×5.5, =5.5×(17.3+6.7), =5.5×24, =132 (18)99×4.2+4.2 =4.2×(99+1), =4.2×100, =420; (19)0.25×1.25×3.2 =0.25×1.25×(4×0.8), =0.25×4×(1.25×0.8), =1×1, =1; (20)6.4×14+15×6.4+6.4 =6.4×(14+15+1), =6.4×30, =192; (21)(1.3+1.3×0.125×8)÷(80﹣77.4) =(1.3+1.3×1)÷2.6, =2.6÷2.6, =1; (22)4×(25+2.5+0.25)÷111 =(4×25+4×2.5+4×0.25)÷111, =(100+10+1)÷111, =111÷111, =1; (23)6.25÷[(17.2﹣3.6×4.5)÷0.32] =6.25÷[(17.2﹣16.2)÷0.32], =6.25÷(1÷0.32), =6.25÷3.125, =2 (24)28.4×99+28.4, =28.4×(99+1), =28.4×100, =2840. (25)0.94×2.5﹣0.45, =2.35﹣0.45, =1.9. (26)4×0.8×12.5×2.5, =(4×2.5)×(0.8×12.5), =10×10, =100. (27)17.5÷0.25×17+13, =70×17+13, =1190+13, =1203 (28)10.1×87, =(10+0.1)×87, =87+8.7, =95.7; (29)2.3+3.19÷(22﹣19.8), =2.3+3.19÷2.2, =2.3+1.45, =3.75; (30)1.25×7.2, =1.25×8×0.9, =10×0.9, =9 (31)9.1﹣1.2÷6﹣6.24 =9.1﹣0.2﹣6.24, =8.9﹣6.24, =2.66; (32)7.3+12.8﹣3.8×2.3 =20.1﹣8.74, =11.36; (33)(5.36+7.64)÷13×100 =13÷13×100, =100; (34)7.575÷[(5.63﹣1.88)×0.2] =7.575÷[3.75×0.2], =7.575÷0.75, =10.1 (35)7.5﹣(5.5+1.24), =7.5﹣5.5﹣1.24, =2﹣1.24, =0.76; (36)0.26+15.68+9.74+2.32, =(0.26+9.74)+(15.68+2.32), =10+18, =28; (37)13.26+9.55﹣3.26, =13.26﹣3.26+9.55, =10+9.55, =19.55; (38)6.1+3.9﹣6.1+3.9, =6.1﹣6.1+(3.9+3.9), =0+7.8, =7.8 (39)31.7÷0.63≈50.32; (40)2.4×1.5+3.6÷1.5 =3.6+2.4, =6; (41)0.32×0.25+0.08÷4 =0.08+0.08÷4, =0.08+0.02, =0.08+0.02, =0.1; (42)(9.6+1.48÷3.7)÷8 =(9.6+0.4)÷8, =10÷8, =1.25; (43)5.8÷[4×(1.34﹣0.14)] =5.8÷[4×1.2], =5.8÷4.8, ≈1.21; (44)5.4÷[0.51÷(1.2﹣1.03)] =5.4÷[0.51÷0.17], =5.4÷3, =1.8 (45)21.35﹣3.25﹣16.75, =21.35﹣(3.25+16.75), =21.35﹣20, =1.35; (46)33.02﹣(148.4﹣90.85)÷2.5, =33.02﹣57.55÷2.5, =33.02﹣23.02, =10; (47)32×2.5×0.125, =4×8×2.5×0.125, =(4×2.5)×(8×0.125), =10×1, =10; (48)18.1+(3﹣0.299÷0.23)×1, =18.1+(3﹣1.3)×1, =18.1+1.7×1, =18.1+1.7, =19.8 (49)67﹣(2.98+0.67), =67﹣3.65, =63.35; (50)8×16﹣73.8×6, =128+442.8, =570.8; (51)(45+14)÷73+710, =59÷73+710, =+710, =710 (52)13.7×0.125×8, =13.7×(0.125×8), =13.7×1, =13.7; (53)0.8×[13﹣(3.12+5.28)], =0.8×[13﹣8.4], =0.8×4.6, =3.68; (54)102×0.56, =(100+2)×0.56, =100×0.56+2×0.56, =56+1.12, =57.12; (55)1.53×1.7+0.47×1.7, =(1.53+0.47)×1.7, =2×1.7, =3.4 (56)5.18+0.73+0.82,. =(5.18+0.82)+0.73, =6+0.73, =6.73; (57)0.75×1.8÷1.5, =1.35÷1.5, =0.9; (58)12.5×7.1×0.8, =(12.5×0.8)×7.1, =10×7.1, =71; (59)6.12×99+6.12, =6.12×(99+1), =6.12×100, =612; (60)8.6÷0.86+8×0.35, =10+2.8, =12.8; (61)5.6×(18.5﹣8.5÷0.5), =5.6×(18.5﹣17), =5.6×1.5, =8.4 (62)0.125×4.78×80, =0.125×4.78×8×10, =(0.125×8)×(4.78×10), =1×47.8, =47.8; (63)2.8×3.6+1.4×2.8, =2.8×(3.6+1.4), =2.8×5, =14; (64)(0.4+40)×2.5, =0.4×2.5+40×2.5, =1+100, =101; (65)78.7﹣17.7×3.6, =78.7﹣63.72, =14.98; (66)18÷[0.3×(8﹣6.5)], =18÷[0.3×1.5], =18÷0.45, =40; (67)12.7+12.5+0.5, =12.7+(12.5+0.5), =12.7+13, =25.7 (68)91÷2.6÷0.05, =35÷0.05, =700; (69)6.3×3.7+6.3×6.3, =6.3×(3.7+6.3), =6.3×10, =63; (70)(3.7+1.7×0.4)÷2.5, =(3.7+0.68)÷2.5, =4.38÷2.5, =1.752; (71)7.28+3.2÷2.5, =7.28+1.28, =8.56; (72)0.74+0.9×7.4, =(1+9)×0.74, =10×0.74, =7.4; (73)7.8÷0.125÷0.8, =7.8÷(0.125×0.8), =7.8÷0.1, =78 (74)37.5÷[0.3×(1.34﹣0.84)], =37.5÷[0.3×0.5], =37.5÷0.15, =250; (75)(2.5+27.75÷1.5)×1.6, =(2.5+18.5)×1.6, =21×1.6, =33.6 (76)6.21﹣3.8+2.2, =2.41+2.2, =4.61; (77)6.03+3.7+2.97, =(6.03+2.97)+3.7, =9+3.7, =12.7; (78)17.43﹣6.57﹣2.43, =17.43﹣(6.57+2.43), =17.43﹣9, =8.43; (79)20.47﹣(1.47+6.8), =20.47﹣1.47﹣6.8, =19﹣6.8, =12.2; (80)13.26+4.71+3.47+5.29, =(13.26+3.47)+(4.71+5.29), =16.73+10, =26.73; 学科网(北京)股份有限公司 $$

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小数混合运算专项练习(专项练习)-2023-2024学年六年级下册数学青岛版
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小数混合运算专项练习(专项练习)-2023-2024学年六年级下册数学青岛版
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小数混合运算专项练习(专项练习)-2023-2024学年六年级下册数学青岛版
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