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小升初真题分类汇编-计算题50题-小学数学六年级下册人教版
1.(2022·曲靖)用递等式计算下面各题,怎样简便就怎样算。
①6.4×2.5×1.25
②8.5×98%
③÷4+×
④×
2.(2022·阳朔)用你喜欢的方法计算下面各题。
(1)91.5﹣12.5+8.5
(2)0.8×2.5×1.25×40
(3) ×125+0.75×74+75%
3.(2022·罗湖)简便计算。
(1)23.7×180%﹣23.7×
(2)95.72﹣5.27﹣4.73
(3)
4.(2022·开平)用递等式计算。
①1204+879+121
②74×60%+×25+0.6
③1.2÷×(0.6﹣)
④×[﹣(+)]
5.(2022·惠阳)用自己喜欢的方法计算。
(1) ÷×
(2)4﹣÷﹣
(3) ×0.875+×
6.(2022·三水)计算下面各题,能简算的要简算。
①
②7.5×8×12.5
③
④193﹣16﹣84
7.(2022·潮安)合理、灵活地计算下面各题。
(1)2.7×9.9+0.27
(2)16×80%+4÷
(3)[﹣(﹣)]÷36
8.(2022·海沧)计算下面各题。
①12.7﹣3.6﹣5.4
②
③
④
9.(2022·顺义)计算。
(1)(+)×30
(2)64×0.25×1.25
(3) ÷[(﹣)×]
10.(2022·泾县)脱式计算(能简算的要简算)。
(1)17×75%+84×﹣0.75
(2)13.92﹣(1.19+9.92)
(3)
11.(2022·黄山)简便计算。
①75.6×27﹣170×7.56
②
③
④
12.(2022·包河)下面各题,怎样算简便就怎样算。
①120+180÷5×6
②9.43﹣(0.39+2.43)
③
④
⑤()×14+
⑥
13.(2022·淮上)计算下面各题(能简算的要简算)。
①210÷35+12×109
②2.5×1.25×16
③()×12
④ [()]
14.(2022·盂县)计算下面各题,能简算的要简算。
①25×32×1.25
②(+0.375)÷(×)
③×+÷7
④6﹣(+)
15.(2022·即墨)脱式计算。(能简算的要简算)
①54×98
②(+﹣)×24
③4.86×[1÷(2.1﹣2.09)]
④8﹣
16.(2022·泗水)脱式计算,能简算的要简算。
①15.28﹣3.6﹣3.4
②()×7.2
③
④7.5÷[(6.8﹣4.3)×0.12]
17.(2022·中山)脱式计算,能简算的要简算。
①36×()
②1.3×37.5%+2.7×
③ [()]
④13÷()×
18.(2022·大余)能简算的要简算。
①(++)×30
②7.2×99+7.2
③(+)×7+
④×153﹣0.6×53
⑤×+÷5+
⑥×[﹣(﹣)]
19.(2022·海南)递等式计算
①12.5×(8+0.8)
②+×
③+÷
④26﹣7.28﹣12.72
⑤5.8×4.1+5.9×5.8
⑥÷(+1.4×)
20.(2022·台儿庄)计算(能简算的要简算)
①7.4﹣6.62+20.6﹣13.38
②×+×
③(-+)÷
④2×0.8×12.5×50%
⑤÷(÷+)
⑥×[1÷(+)]
21.(2022·北辰)能简算的要简算
(1)10÷+×4
(2)24×(++)
(3)50.2+5.25+0.8+0.75
(4)[1﹣(+)]÷
22.(2022·未央)脱式计算
(1)12﹣﹣=
(2)400﹣375÷25
(3)27÷[(﹣)×]
(4)189×3.6﹣89÷
23.(2022·蕲春)下面各题,怎样简便怎样算。
(1)17.35﹣3.25﹣2.75
(2) ÷[(0.75﹣)×]
(3)8.5÷+7.5×75%+
(4)0.25×3.2×12.8
24.(2022·铁西)脱式计算(能简算的要简算)
(1)3.6﹣2.8+7.4﹣7.2
(2)1.25×32×0.25
(3)6.75×+4.25×0.6﹣60%
(4) ×+÷
25.(2022·绵阳)选择适当的方法计算下列各题。
(1)3.2+3.2×7+1×3
(2) ×34×12×
(3)1990×1999﹣1989×2000
26.(2022·思明)求未知数。
(1)1+0.4x=4.6
(2)8x﹣5x=30
(3) :x=3:12
27.(2022·红塔)解方程。
(1)3x=
(2)x:2=:
(3)(x+13.2)×=6
28.(2022·滁州)解方程
(1)0.3x﹣1.2×2=4.8
(2)18:(x+6)=
(3) x:=24:1
29.(2022·回民)求未知数x。
(1)4.2+x=16.2
(2)3.2(x﹣)=16
(3)x:=:
30.(2022·共和)解方程
(1) ﹣x=
(2)3:x=:
(3)x+(﹣)=
31.(2022·郏县)解方程
(1) x+50%x=35
(2) :x=:
32.(2022·旌阳)求未知数。
(1) :=x:10
(2) x-x=6
33.(2022·阳城)解方程
(1) :=x:
(2)75%x﹣20%x=11
(3) x+=
34.(2022·巩义)求未知数x
(1) :8=:x
(2) x﹣0.15x=16
35.(2022·木兰)求未知数x。
(1) :=x:
(2)2x+40%x=84
(3)6×(x﹣12)=18
36.(2022·勃利)解方程(或比例)。
(1) x﹣x=
(2)x:=8:
37.(2022·双城)解方程或解比例
(1)x﹣25%x=
(2)15:x=4:12
38.(2022·赤坎)解方程
(1)5x﹣0.8×10=12
(2)8x﹣x=16.8
(3)x:1.2=4:0.8
39.(2022·惠州)解方程。
(1) ﹣14.5=5.5
(2)x﹣60%x=20
(3)1.8:x=:
40.(2022·英德)解方程
(1) x﹣x=
(2)12x÷6=8.5
(3) :x=3:4
41.(2022·惠来)解方程。
(1)x:4=:3
(2) x﹣50%x=140
42.(2022·香洲)解方程(或解比例)
(1) x+xx=42
(2) :=x:
43.(2022·南山)解方程
(1)3x+0.6×2=7.5
(2)4x﹣60%x=6.8
(3)48:=x:3
44.(2022·荔湾)解比例。
(1)0.6:x=3:1.5
(2) =
45.(2022·荔湾)解下列方程。
(1)28﹣0.5x=10
(2) =70%
46.(2022·平山)我最认真:解方程。
(1)x﹣74%=5.2
(2)12:x=
(3) x+x=1.4
(4) x﹣0.25×7=3.5
47.(2022·兴义)解比例。
(1)25:x=0.2:80%
(2)25%:=:x
(3)20:x=
48.(2022·安溪)解方程
(1)3x﹣8.6=16
(2)x+20%x=72
(3) :x=:
49.(2022·海南)求未知数x。
(1)15+x=36
(2)2x﹣5=1.6
(3)x:2=:
50.(2022·樊城)解方程
(1)3:10=x:
(2)5x﹣x=19.2
(3)30%x+25=40
答案解析部分
1.【答案】解:①6.4×2.5×1.25
=8×0.8×2.5×1.25
=(8×2.5)×(0.8×1.25)
=20×1
=20
②8.5×98%
=8.5×(1﹣0.02)
=8.5×1﹣8.5×0.02
=8.5﹣0.17
=8.33
③ ÷4+ ×
= × + ×
=( + )×
=1×
=
④ ×
= ×[ ÷ ]
= ×
=
2.【答案】(1)解:91.5-12.5+8.5
=91.5+8.5-12.5
=100-12.5
=87.5
(2)解:0.8×2.5×1.25×40
=(0.8×1.25)×(2.5×40)
=1×100
=100
(3)解: ×125+0.75×74+75%
=0.75×(125+74+1)
=0.75×200
=150
3.【答案】(1)解:23.7×180%﹣23.7×
=23.8×(1.8﹣0.8)
=23.8×1
=23.8
(2)解:95.72﹣5.27﹣4.73
=95.72﹣(5.27+4.73)
=95.72﹣10
=85.72
(3)解:
= ×(99+1)
= ×100
=125
4.【答案】解:①1204+879+121
=1204+(879+121)
=1204+1000
=2204
②74×60%+ ×25+0.6
=0.6×(74+25+1)
=0.6×100
=60
③1.2÷ ×(0.6﹣ )
=1.2÷ ×0.3
=1.8×0.3
=0.54
④ ×[ ﹣( + )]
= ×[ ﹣ ]
= ×
=
5.【答案】(1)解: ÷ ×
= × ×
=×
=
(2)解:4- ÷ -
=4- -
=4-( + )
=4-2
=2
(3)解: ×0.875+ ×
= ×(0.875+ )
= ×1
=
6.【答案】解:①
=( + )+( + )
=1+1
=2
②7.5×8×12.5
=7.5×(8×12.5)
=7.5×100
=750
③
= ×( - )
= ×1
=
④193-16-84
=193-(16+84)
=193-100
=93
7.【答案】(1)解:2.7×9.9+0.27
=2.7×9.9+2.7×0.1
=2.7×(9.9+0.1)
=2.7×10
=27
(2)解:16×80%+4÷
=16×80%+4×
=(16+4)×80%
=20×80%
=16
(3)解:[ -( - )]÷36
=[ + - ]÷36
=[1- ]÷36
= ÷36
=
8.【答案】解:①12.7-3.6-5.4
=12.7-(3.6+5.4)
=12.7-9
=3.7
②×-
=-
=-
=
③75×(+)
=75×+75×
=50+15
=65
④×[1-(+)]
=×[1-]
=×
=
9.【答案】(1)解:( + )×30
= ×30+ ×30
=5+4
=9
(2)解:64×0.25×1.25
=(8×8)×0.25×1.25
=(8×0.25)×(8×1.25)
=2×10
=20
(3)解: ÷[( ﹣ )× ]
= ÷[ × ]
= ÷
=40
10.【答案】(1)解:17×75%+84× ﹣0.75
=17×0.75+84×0.75﹣0.75
=(17+84﹣1)×0.75
=100×0.75
=75
(2)解:13.92﹣(1.19+9.92)
=13.92﹣1.19﹣9.92
=13.92﹣9.92﹣1.19
=4﹣1.19
=2.81
(3)解:
= ÷[2﹣( + )]
= ÷[2﹣ ]
= ÷
= ×
=
11.【答案】解:①75.6×27﹣170×7.56
=75.6×27﹣17×75.6
=75.6×(27﹣17)
=75.6×10
=756
②
=6 ﹣3 +8.1+6.9
=6 ﹣3 +(8.1+6.9)
=3 +15
=18
③
= ÷
=
④
= × + ×
= ×( + )
= ×1
=
12.【答案】解:①120+180÷5×6
=120+36×6
=120+216
=336
②9.43﹣(0.39+2.43)
=9.43﹣0.39﹣2.43
=9.43﹣2.43﹣0.39
=7﹣0.39
=6.61
③
= + ÷2
= +
=
④
= × + ×
=( + )×
=1×
=
⑤( )×14+
= ×14+ ×14+
= +4+
= + +4
=3+4
=7
⑥
= ÷[ × ]
= ÷
=
13.【答案】解:①210÷35+12×109
=6+1308
=1314
②2.5×1.25×16
=2.5×1.25×(2×8)
=(2.5×2)×(1.25×8)
=5×10
=50
③( )×12
= ×12﹣ ×12+ ×12
=4﹣2+3
=5
④ [ ()]
= ÷[ × ]
= ÷
=4
14.【答案】解:①25×32×1.25
=(25×4)×(8×1.25)
=100×10
=1000
②( +0.375)÷( × )
=( + )÷
= ×
=
③ × + ÷7
= × + ×
=( + )×
= ×
=
④6 ﹣( + )
=6 ﹣ ﹣
=6﹣
=5
15.【答案】解:①54×98
=54×(100-2)
=54×100-54×2
=5400﹣108
=5292
②( + - )×24
= ×24+ ×24- ×24
=14+9-19
=23-19
=4
③4.86×[1÷(2.1-2.09)]
=4.86×[1÷0.01]
=4.86×100
=486
④8-
=8- -
=8-( + )
=8-
=
16.【答案】解:①15.28-3.6-3.4
=15.28-(3.6+3.4)
=15.28-7
=8.28
②( )×7.2
= ×7.2+ ×7.2- ×7.2
=6+1.6-2.7
=4.9
③
= ×0.75+0.75×
=( + )×0.75
=1×0.75
=0.75
④7.5÷[(6.8-4.3)×0.12]
=7.5÷[2.5×0.12]
=7.5÷0.3
=25
17.【答案】解:①36×( )
=36× -36× +36×
=27﹣24+30
=33
②1.3×37.5%+2.7×
=(1.3+2.7)×
=4×
=
③ [ ( )]
= [ ]
= ×
=1
④13÷( )×
=13÷ ×
=12×
=9
18.【答案】解:①( + + )×30
= ×30+ ×30+ ×30
=21+25+24
=46+24
=70
②7.2×99+7.2
=7.2×(99+1)
=7.2×100
=720
③( + )×7+
= ×7+ ×7+
=5+ +
=5+( + )
=5+1
=6
④ ×153-0.6×53
= ×(153×53)
= ×100
=60
⑤ × + ÷5+
= × + × +
=( + +1)×
=2×
=
⑥ ×[ -( - )]
= ×[ + - ]
= ×(1- )
= ×
=
19.【答案】解:①12.5×(8+0.8)
=12.5×8+12.5×0.8)
=100+10
=110
② + ×
= +
=
③ + ÷
= +
=
④26-7.28-12.72
=26-(7.28+12.72)
=26-20
=6
⑤5.8×4.1+5.9×5.8
=5.8×(4.1+5.9)
=5.8×10
=58
⑥ ÷( +1.4× )
= ÷( + )
= ÷
=
20.【答案】解:①7.4-6.62+20.6-13.38
=(7.4+20.6)-(6.62+13.38)
=28-20
=8
② × + ×
= ×( + )
= ×1
=
③( - + )÷
=( - + )×48
=15﹣7+38
=46
④2×0.8×12.5×50%
=(2×50%)×(12.5×0.8)
=1×10
=10
⑤ ÷( ÷ + )
= ÷( × + )
= ×
=
⑥ ×[1÷( + )]
= ×(1÷ )
=
21.【答案】(1)解:10÷+×4
=18+2.5
=20.5
(2)解:24×(++)
=24× +24× + ×24
=20+16+14
=50
(3)解:50.2+5.25+0.8+0.75
=50.2+0.8+(5.25+0.75)
=51+6
=57
(4)解:[1﹣(+)]÷
=[1﹣ ]÷
= ÷
=
22.【答案】(1)解:12﹣﹣
=12-(+)
=12-2
=10
(2)解:400﹣375÷25
=400﹣15
=385
(3)解:27÷[(﹣)×]
=27÷( × )
=27÷
=72
(4)解:189×3.6﹣89÷
=3.6×(189﹣89)
=3.6×100
=360
23.【答案】(1)解:17.35﹣3.25﹣2.75
=17.3﹣(3.25+2.75)
=17.3﹣6
=11.3
(2)解: ÷[(0.75﹣)×]
= ÷[( ﹣ )× ]
= ÷( × )
=÷
=5
(3)解:8.5÷+7.5×75%+
=8.5×0.75+7.5×0.75+0.75
=(8.5+7.5+1)×0.75
=17×0.75
=12.75
(4)解:0.25×3.2×12.8
=0.25×4×0.8×12.8
=1×0.8×12.8
=10.24
24.【答案】(1)解:3.6﹣2.8+7.4﹣7.2
=(3.6+7.4)﹣(2.8+7.2)
=11﹣10
=1
(2)解:1.25×32×0.25
=1.25×(4×8)×0.25
=(1.25×8)×(4×0.25)
=10×1
=10
(3)解:6.75×+4.25×0.6﹣60%
=6.75×0.6+4.25×0.6﹣0.6
=(6.75+4.25﹣1)×0.6
=10×0.6
=6
(4)解: ×+÷
= × + ×
= ×( + )
= ×1
=
25.【答案】(1)解:3.2+3.2×7 +1 ×3
=(1+7 +1 )×3.2
=10×3.2
=32
(2)解: ×34×12×
=( ×12 )×(34× )
= ×
=
(3)解:1990×1999﹣1989×2000
=1990×(2000﹣1)﹣1989×2000
=1990×2000﹣1990×1﹣1989×2000
=(1990﹣1989)×2000﹣1990
=1×2000﹣1990
=2000﹣1990
=10
26.【答案】(1)解:1+0.4x﹣1=4.6﹣1
0.4x÷0.4=3.6÷0.4
x=9
(2)解:3x=30
3x÷3=30÷3
x=10
(3)解:3x=×12
3x÷3=9÷3
x=3
27.【答案】(1)解:x=÷3
x=
(2)解: x= ×2
x=÷
x=
(3)解: x+13.2=6÷
x+13.2﹣13.2=14﹣13.2
x=0.8
28.【答案】(1)解:0.3x﹣2.4+2.4=4.8+2.4
0.3x÷0.3=7.2÷0.3
x=24
(2)解:3(x+6)=18×5
3(x+6)÷3=90÷3
x+6﹣6=30﹣6
x=24
(3)解: x =24×
x=18÷
x=54
29.【答案】(1)解:4.2+ x﹣4.2=16.2﹣4.2
x=12
x=12×
x=18
(2)解:3.2(x﹣ )÷3.2=16÷3.2
x﹣ =5
x=5+
x=5
(3)解:x=×
x=
x=×
x=
30.【答案】(1)解: ﹣x=
x=-
x=
(2)解:3:x=:
x= ×3
x=
x=÷
x=
(3)解:x+(﹣)=
x+ =
x = ﹣
x=
31.【答案】(1)解: x+50%x=35
x=35
x=35÷
x=30
(2)解: :x=:
x=
x=÷
x=
32.【答案】(1)解: :=x:10
x=2
x=2÷
x=20
(2)解: x-x=6
x=6
x=6÷
x=36
33.【答案】(1)解: :=x:
x=
8× x=8×
x=
(2)解:75%x-20%x=11
0.55x=11
0.55x÷0.55=11÷0.55
x=20
(3)解: x+=
x=
x=÷
x=
34.【答案】(1)解: :8=:x
x=6
x=6÷
x=30
(2)解: x-0.15x=16
0.25x=16
4×0.25x=16×4
x=64
35.【答案】(1)解: x= ×
x=
(2)解:2.4x=84
2.4x÷2.4=84÷2.4
x=35
(3)解:6×(x﹣12)÷6=18÷6
x﹣12+12=3+12
x=15
36.【答案】(1)解: x﹣x=
x=
x=×8
x=
(2)解:x:=8:
x= ×8
x =
x=×3
x=2
37.【答案】(1)解: 0.75x=0.9
0.75x÷0.75=0.9÷0.75
x=1.2
(2)解:4x=15×12
4x=180
4x÷4=180÷4
x=45
38.【答案】(1)解:5x﹣8+8=12+8
5x÷5=20÷5
x=4
(2)解:7x=16.8
7x÷7=16.8÷7
x=2.4
(3)解: 0.8x=1.2×4
0.8x÷0.8=4.8÷0.8
x=6
39.【答案】(1)解:﹣14.5+14.5=5.5+14.5
=20
x=160
(2)解: 40%x=20
40%x÷40%=20÷40%
x=50
(3)解:x=1.8×
x=1.5
x=3
40.【答案】(1)解: x-x=
x=
x=÷
x=
(2)解:12x÷6=8.5
12x÷6×6=8.5×6
12x÷12=51÷12
x=4.25
(3)解: :x=3:4
3x= ×4
3x÷3=2÷3
x=
41.【答案】(1)解:x:4=:3
3x=4×
3x=
x=
(2)解: x-50%x=140
x=140
x=140÷
x=560
42.【答案】(1)解: x+×x=42
x=42
x=42÷
x=36
(2)解: :=x:
x= ×
x=
x=÷
x=
43.【答案】(1)解:3x+0.6×2=7.5
3x+1.2=7.5
3x+1.2-1.2=7.5-1.2
3x÷3=6.3÷3
x=2.1
(2)解:4x-60%x=6.8
3.4x=6.8
3.4x÷3.4=6.8÷3.4
x=2
(3)解:48:=x:3
x=48×3
x÷ =144÷
x=576
44.【答案】(1)解:3x=0.9
3x÷3=0.9÷3
x=0.3
(2)解:4x=16
4x÷4=16÷4
x=4
45.【答案】(1)解:28﹣0.5x+0.5x=10﹣28+0.5x
28=10+0.5x
10+0.5x=28
10+0.5x﹣10=28﹣10
0.5x=18
0.5x÷0.5=18÷0.5
x=36
(2)解:×2=70%×2
x=1.4
46.【答案】(1)解: x-74%=5.2
x-74%+74%=5.2+74%
x=5.94
(2)解:12:x=
5x=14.4
5x÷5=14.4÷5
x=2.88
(3)解: x+x=1.4
x=1.4
x=1.4÷
x=2.4
(4)解: x-0.25×7=3.5
x-0.25×7+0.25×7=3.5+0.25×7
x=5.25
x=5.25÷
x=7.875
47.【答案】(1)解:25:x=0.2:80%
0.2x=20
5×0.2x=20×5
x=100
(2)解:25%:=:x
0.25x=
4×0.25x= ×4
x=
(3)解:20:x=
18x=72
18x÷18=72÷18
x=4
48.【答案】(1)解: 3x-8.6=16
3x-8.6+8.6=16+8.6
3x=24.6
3x÷3=24.6÷3
x=8.2
(2)解:x+20%x=72
1.2x=72
1.2x÷1.2=72÷1.2
x=60
(3)解: :x=:
x= ×
x=
x=÷
x=
49.【答案】(1)解:15+x﹣15=36﹣15
x=21
(2)解:2x﹣5+5=1.6+5
2x=6.6
2x÷2=6.6÷2
x=3.3
(3)解: x=2×
x=
50.【答案】(1)解:10x=3×
10x÷10= ÷10
x=
(2)解: 4 x=19.2
4 x÷4 =19.2÷4
x=4
(3)解:30%x+25﹣25=40﹣25
30%x=15
30%x÷30%=15÷30%
x=50
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