河南省郑州市三年(2020-2022)小升初数学卷真题分题型分层汇编
09计算题(基础题)
整数、分数、小数、百分数四则混合运算(共20小题)
(2020 荥阳市)直接写出得数.
0.27+0.68= 8.2﹣1.65= 4.8×= 20.5÷5=
0.23= 4﹣= 697×4≈ ×(﹣0.4)=
(2021 郑州)口算。
100×1%= 38×45= 5÷50= a+0.3a= 3﹣1.95= +×0=
12.8÷4= 5÷= 2.5×4= 6.3÷0.7= ×2= 0.86+0.4=
(2021 金水区)用合适的方法计算下面各题。
(1)9.38﹣(2.5+1.38) (2)24×(+) (3)4÷﹣÷4
(2022 郑州)计算题
(1)0.75×4.75+4×4.25 (2)
(2022 二七区)直接写出下面各题的得数。
+= 3﹣1.7= 1.25×8= ÷4=
36+64= ×= ﹣= ÷=
×18= 4.8×= 1÷50%= 3.14×32=
(2020 中原区)口算.
25×40= 3÷12= = 3.7+5.3=
= = = =
(2020 新郑市)直接写出得数.
×8= ÷2= ÷= ×= 6.8÷10%=
×= 1÷= ÷60%= ×15= :=
(2021 中原区)口算。
0.6×= 930÷30= ×= 2.6+7.4=
101﹣19= ﹣= ÷= 3.25﹣=
(2020 荥阳市)计算或求未知数x.
37.8+720÷45 ÷[×(﹣)] 0.4×0.08×25×12.5 ×+×+×
x﹣x=48 4x÷= :x=:2 0.5:8.4=15:x
(2020 高新区)口算.
21×498≈ 1.8×40= 12.3÷0.001= 59×101=
93.05﹣3.96= 910÷70= 79.8+1.26= 32×25%=
12.5×8÷12.5×8= 8= = 3×=
= 2.5×= ()×45= 632÷69≈
(2020 巩义市)计算.
①32.5﹣4﹣5.2
②÷[1﹣()]
③2.5×0.4÷2.5×0.4
④()×16
(2022 新密市)脱式计算,能简算的要简算。
3.25﹣+4.75﹣ 3.5×+5.5×80%+0.8
78×29+2×71×39 (125+25)×8×4 ×0.76+24%÷
(2022 新密市)直接写得数
1.38﹣0.03= ÷= 0.28×= 36×25%=
﹣= 0.72÷0.04= 400÷25÷4= 0.3×2÷0.3×2=
(2020 新郑市)怎样算简便就怎样算。
÷(4﹣﹣) ×58+42÷8 36×(+﹣)
(2020 高新区)脱式计算,能简算的要简算.
(1)×32+68×0.6
(2)÷[×]
(3)()×36
(4)7200÷125÷8
(2021 郑州)递等式计算(能简算的要简算)。
7﹣2+(2﹣1) 125×198÷(18÷8) ×4÷4×
2.5÷× 4.8÷[2﹣(﹣)×3] 3.34+0.55+7.66+0.45
(2022 巩义市)用你喜欢的方法计算。
①2÷2.5+2.5×0.8 ②100﹣40×8.9×0.25
③65×75%+23×﹣8×0.75 ④24÷[(﹣)×(5.7﹣2.7)]
(2022 二七区)计算。
①76×101 ②×[﹣(﹣)] ③72÷1.6+5.5 ④:x=3:12
(2022 登封市)选择合适的方法计算。(写出主要计算过程)
1152÷32×20 6.45﹣+2.55﹣ 3.2×(2.5×1.25) ÷[(0.75﹣)×]
(2022 登封市)直接写得数。
2019+60= += 0.33= 20÷=
×6= 4.8÷0.16= 3.3+7= 1﹣+=
参考答案与试题解析
整数、分数、小数、百分数四则混合运算(共20小题)
(2020 荥阳市)直接写出得数.
0.27+0.68= 8.2﹣1.65= 4.8×= 20.5÷5=
0.23= 4﹣= 697×4≈ ×(﹣0.4)=
【解答】解:
0.27+0.68=0.95 8.2﹣1.65=6.55 4.8×=1.8 20.5÷5=4.1
0.23=0.008 4﹣=3 697×4≈2800 ×(﹣0.4)=0
(2021 郑州)口算。
100×1%= 38×45= 5÷50= a+0.3a= 3﹣1.95= +×0=
12.8÷4= 5÷= 2.5×4= 6.3÷0.7= ×2= 0.86+0.4=
【解答】解:
100×1%=1 38×45=1710 5÷50=0.1 a+0.3a=1.3a 3﹣1.95=1.05 +×0=
12.8÷4=3.2 5÷=6 2.5×4=10 6.3÷0.7=9 ×2= 0.86+0.4=1.26
(2021 金水区)用合适的方法计算下面各题。
(1)9.38﹣(2.5+1.38) (2)24×(+) (3)4÷﹣÷4
【解答】解:(1)9.38﹣(2.5+1.38)
=9.38﹣1.38﹣2.5
=8﹣2.5
=5.5
(2)24×(+)
=24×+24×
=20+15
=35
(3)4÷﹣÷4
=5﹣
=4
(2022 郑州)计算题
(1)0.75×4.75+4×4.25 (2)
【解答】解:(1)0.75×4.75+4×4.25
=4.75×(0.75+1+4.25)
=4.75×6
=28.5
(2)
=+++
=+++
=1
(2022 二七区)直接写出下面各题的得数。
+= 3﹣1.7= 1.25×8= ÷4=
36+64= ×= ﹣= ÷=
×18= 4.8×= 1÷50%= 3.14×32=
【解答】解:
+= 3﹣1.7=1.3 1.25×8=10 ÷4=
36+64=100 ×=1 ﹣= ÷=1
×18=3 4.8×=0.4 1÷50%=2 3.14×32=28.26
(2020 中原区)口算.
25×40= 3÷12= = 3.7+5.3=
= = = =
【解答】解:
25×40=1000 3÷12= = 3.7+5.3=9
=3 = =3 =0.9
(2020 新郑市)直接写出得数.
×8= ÷2= ÷= ×= 6.8÷10%=
×= 1÷= ÷60%= ×15= :=
【解答】解:
×8=6 ÷2= ÷= ×= 6.8÷10%=68
×= 1÷= ÷60%= ×15= :=
(2021 中原区)口算。
0.6×= 930÷30= ×= 2.6+7.4=
101﹣19= ﹣= ÷= 3.25﹣=
【解答】解:
0.6×=0.4 930÷30=31 ×= 2.6+7.4=10
101﹣19=82 ﹣= ÷=2 3.25﹣=3
(2020 荥阳市)计算或求未知数x.
37.8+720÷45 ÷[×(﹣)] 0.4×0.08×25×12.5 ×+×+×
x﹣x=48 4x÷= :x=:2 0.5:8.4=15:x
【解答】解:①37.8+720÷45
=37.8+16
=53.8
②÷[×(﹣)]
=÷[]
=
=
=2
③0.4×0.08×25×12.5
=(0.4×25)×(0.08×12.5)
=10×1
=10
④×+×+×
=
=(++)
=
=
⑤x﹣x=48
x=48
x×=48×
x=128
⑥4x÷=
4x=
4x=
4x÷4=
x=
⑦:x=:2
x=
x=
x×9=
x=
⑧0.5:8.4=15:x
0.5x=8.4×15
x=
x=252
(2020 高新区)口算.
21×498≈ 1.8×40= 12.3÷0.001= 59×101=
93.05﹣3.96= 910÷70= 79.8+1.26= 32×25%=
12.5×8÷12.5×8= 8= = 3×=
= 2.5×= ()×45= 632÷69≈
【解答】解:
21×498≈10000 1.8×40=72 12.3÷0.001=12300 59×101=5959
93.05﹣3.96=89.09 910÷70=13 79.8+1.26=81.06 32×25%=8
12.5×8÷12.5×8=64 8=9 = 3×=
=0 2.5×=7 ()×45=13 632÷69≈9
(2020 巩义市)计算.
①32.5﹣4﹣5.2
②÷[1﹣()]
③2.5×0.4÷2.5×0.4
④()×16
【解答】解:①32.5﹣4﹣5.2
=32.5﹣(4+5.2)
=32.5﹣10
=22.5
②÷[1﹣()]
=÷[1﹣]
=÷
=
③2.5×0.4÷2.5×0.4
=(2.5÷2.5)×(0.4×0.4)
=1×0.16
=0.16
④()×16
=
=6+4﹣7
=3
(2022 新密市)脱式计算,能简算的要简算。
3.25﹣+4.75﹣ 3.5×+5.5×80%+0.8
78×29+2×71×39 (125+25)×8×4 ×0.76+24%÷
【解答】解:3.25﹣+4.75﹣
=(3.25+4.75)﹣(+)
=8﹣1
=7
3.5×+5.5×80%+0.8
=3.5×0.8+5.5×0.8+0.8
=0.8×(3.5+5.5+1)
=0.8×10
=8
÷[(﹣)×]
=÷[×]
=÷
=×12
=7
78×29+2×71×39
=78×29+71×78
=78×(21+79)
=78×100
=7800
(125+25)×8×4
=125×8×4+25×8×4
=4000+800
=4800
×0.76+24%÷
=×0.76+0.24×
=×(0.76+0.24)
=×1
=
(2022 新密市)直接写得数
1.38﹣0.03= ÷= 0.28×= 36×25%=
﹣= 0.72÷0.04= 400÷25÷4= 0.3×2÷0.3×2=
【解答】解:
1.38﹣0.03=1.35 ÷= 0.28×=0.16 36×25%=9
﹣= 0.72÷0.04=18 400÷25÷4=4 0.3×2÷0.3×2=4
(2020 新郑市)怎样算简便就怎样算。
÷(4﹣﹣) ×58+42÷8 36×(+﹣)
【解答】解:(1)×
=××
=
=
(2)÷(4﹣﹣)
=÷[4﹣(+)]
=÷[4﹣1]
=÷3
=
(3)×58+42÷8
=×58+42×
=×(58+42)
=×100
=12.5
(4)36×(+﹣)
=36×+36×﹣36×
=24+6﹣27
=30﹣27
=3
(2020 高新区)脱式计算,能简算的要简算.
(1)×32+68×0.6
(2)÷[×]
(3)()×36
(4)7200÷125÷8
【解答】解:(1)×32+68×0.6
=0.6×32+68×0.6
=0.6×(32+68)
=0.6×100
=60
(2)÷[×]
=÷[×]
=÷
=
(3)()×36
=
=27+4﹣15
=16
(4)7200÷125÷8
=7200÷(125×8)
=7200÷1000
=7.2
(2021 郑州)递等式计算(能简算的要简算)。
7﹣2+(2﹣1) 125×198÷(18÷8) ×4÷4×
2.5÷× 4.8÷[2﹣(﹣)×3] 3.34+0.55+7.66+0.45
【解答】解:(1)7﹣2+(2﹣1)
=7﹣2+2﹣1
=(7+2)﹣(2+1)
=10﹣4
=6
(2)125×198÷(18÷8)
=125×198÷18×8
=(125×8)×(198÷18)
=1000×11
=11000
(3)×4÷4×
=(×)×(4÷4)
=×1
=
(4)2.5÷×
=4×
=7
(5)4.8÷[2﹣(﹣)×3]
=4.8÷[2﹣×3]
=4.8÷[2﹣1.5]
=4.8÷0.5
=9.6
(6)3.34+0.55+7.66+0.45
=(3.34+7.66)+(0.55+0.45)
=11+1
=12
(2022 巩义市)用你喜欢的方法计算。
①2÷2.5+2.5×0.8 ②100﹣40×8.9×0.25
③65×75%+23×﹣8×0.75 ④24÷[(﹣)×(5.7﹣2.7)]
【解答】解:①2÷2.5+2.5×0.8
=0.8+2
=2.8
②100﹣40×8.9×0.25
=100﹣40×0.25×8.9
=100﹣10×8.9
=100﹣89
=11
③65×75%+23×﹣8×0.75
=65×0.75+23×0.75﹣8×0.75
=(65+23﹣8)×0.75
=80×0.75
=60
④24÷[(﹣)×(5.7﹣2.7)]
=24÷[×3]
=24×
=36
(2022 二七区)计算。
①76×101 ②×[﹣(﹣)] ③72÷1.6+5.5 ④:x=3:12
【解答】解:①76×101
=76×(100+1)
=76×100+76×1
=7600+76
=7676
②×[﹣(﹣)]
=×[﹣]
=×
=
③72÷1.6+5.5
=45+5.5
=50.5
④:x=3:12
3x=×12
3x÷3=×12÷3
x=3
(2022 登封市)选择合适的方法计算。(写出主要计算过程)
1152÷32×20 6.45﹣+2.55﹣ 3.2×(2.5×1.25) ÷[(0.75﹣)×]
【解答】解:(1)1152÷32×20
=36×20
=720
(2)6.45﹣+2.55﹣
=(6.45+2.55)﹣(+)
=9﹣1
=8
(3)3.2×(2.5×1.25)
=(4×0.8)×(2.5×1.25)
=(4×2.5)×(0.8×1.25)
=10×1
=10
(4)÷[(0.75﹣)×]
=÷[×]
=÷
=5
(2022 登封市)直接写得数。
2019+60= += 0.33= 20÷=
×6= 4.8÷0.16= 3.3+7= 1﹣+=
【解答】解:
2019+60=2079 += 0.33=0.027 20÷=25
×6= 4.8÷0.16=30 3.3+7=10.7 1﹣+=