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分数乘除法计算题突破(专项训练)数学六年级上册北师大版
1.计算下列各题,能简算的要简算
(1) ×÷
(2)(+)×
(3)2-÷-
2.计算下面各题,能简算的要简算
(1) ×÷
(2)(+)×14
(3) ÷(+)
3.用简便方法计算
(1) ÷7+×
(2) ××(42×52)
(3)24×(+-)
4.计算下面各题,怎么简便怎么算
①
②
③
④
⑤
⑥58×0.6+42×
5.用合适的方法计算下面各题。
(1) ×÷
(2)24×(+-)
(3) ×-÷
6.计算下面各题,能简算的要简算
(1) ×÷
(2) ÷〔(1-)÷5〕
(3)13--
(4)(+)×24
7.计算下面各题,能简算的要简算。
(1) +++
(2) ÷+×
(3) +3÷
(4)68×(-)
8.计算下面各题,能简算的要简算
①÷×
②÷(+)
③(+-)÷
④×+×
⑤×38×15×
⑥(+)×3×9
9.用你喜欢的方法计算。
①÷÷
②45×
③(-)÷
④÷+×
10.计算下面各题,能简算的要简算
(1)
(2)
(3)
(4)
11.能简便的用简便计算
(1) +×
(2)7.5×+7.5×
(3)30×(--)
(4)1999×
12.灵活计算
①
②( )×54
③
④
⑤ ×16
⑥
13.计算下面各题,能简便算的要简便算.
①
②
③ ÷( )
④78×
⑤
⑥( )×2.4
14.计算下列各题,能简算的要简算
① × ÷
② ÷23+ ×
③ +( + )
④35×
⑤( + )×20
15.计算(怎样简便就怎样算).
①
②
③86×
④
⑤( )×4.5
⑥15×
16.计算,能简算的要简算。
(1) × + ÷
(2) + ÷ +
(3) ×24
(4)10÷ + ×4
17.用你喜欢的方法计算。
(1) ÷( -0.25)
(2) × ÷ ÷
(3) ÷ ×
18.计算下面各题。
(1)
(2)
(3)(7- )×
(4)
答案解析部分
1.【答案】(1)解: ×÷
=×1
=
(2)解:(+)×
=×+×
=+
=
(3)解:2-÷-
=2--
=2-(+)
=2-2
=0
2.【答案】(1)解: ×÷
=×4
=
(2)解: (+)×14
=×14+×14
=3+7
=10
(3)解: ÷(+)
=÷
=
3.【答案】(1)解: ÷7+×
=(+)×
=1×
=
(2)解: ××(42×52)
=(×42)×(×52)
=27×10
=270
(3)解: 24×(+-)
=24×+24×-24×
=16+15-18
=31-18
=13
4.【答案】解:①
=×
=
②
=1×
=
③
=24÷
=
④
=÷[×]
=÷
=
⑤
=(-)×
=×
=
⑥58×0.6+42×
=(58+42)×0.6
=100×0.6
=60
5.【答案】(1)解: ×÷
=×3
=
(2)解: 24×(+-)
=24×+24×-24×
=6+4-8
=10-8
=2
(3)解: ×-÷
=(-)×
=×
=
6.【答案】(1)解: ×÷
=1×
=
(2)解:÷[(1-)÷5]
=÷[÷5]
=÷
=3
(3)解: 13--
=13-(+)
=13-1
=12
(4)解: (+)×24
=×24+×24
=20-9
=11
7.【答案】(1)解: +++
=(+)+(+)
=1+
=
(2)解: ÷+×
=(+)×
=1×
=
(3)解: +3÷
=+6
=
(4)解: 68×(-)
=68×-68×
=51-44
=7
8.【答案】解:①÷×
=×
=
②÷(+)
=÷
=
③(+-)÷
=×36+×36-×36
=30+10-27
=13
④×+×
=×(+)
=×1
=
⑤×38×15×
=(×15)×(38×)
=3×8
=24
⑥(+)×3×9
=×3×9+×3×9
=24+4
=28
9.【答案】解:① ÷ ÷
= × ×
=
②45×
=(44+1)×
=44× +1×
=7
③( - )÷
=( - )×6
= ×6- ×6
= -
=
④ ÷ + ×
= × + ×
= ×( + )
=
10.【答案】(1)解:×+×
=(+)×
=1×
=
(2)解:34×
=(33+1)×
=33×+1×
=31+
=
(3)解:(-+)÷
=×24-×24+×24
=22-18+4
=4+4
=8
(4)解:×+×
=×(+)
=×
=
11.【答案】(1)解: +×
=+
=
(2)解:7.5×+7.5×
=7.5×(+)
=7.5×1
=7.5
(3)解:30×(--)
=30×-30×-30×
=24-10-2
=14-2
=12
(4)解:1999×
=(1998+1)×
=1998×+1×
=999+
=
12.【答案】①= + = ②( )×54=54× ×54=42+10=52③= ×( + )= ×1= ④= ﹣ ﹣ = ﹣( + )= ﹣1= ⑤ × ×16= ×( ×16)= ×2= ⑥= ×(99+1)= ×100=40
13.【答案】解:①
=
=
②
=
=
=1
③ ÷( )
=
=
④78×
=(79﹣1)×
=25﹣
=
⑤
=
=
⑥( )×2.4
=
=2.1﹣1
=1.1
14.【答案】解:① × ÷
= × ×
=
② ÷23+ ×
= × + ×
= ×( + )
= ×1
=
③ +( + )
= + +
= +
=
④35×
=(34+1)×
=34× +
=11+
=11
⑤( + )×20
= ×20+ ×20
=9+16
=25
15.【答案】①
= ×7
= ×7
=
②
= + +
=1+
=1
③86×
=(87﹣1)×
=87× ﹣1×
=86﹣
=85
④
= ×7+ ×7
=( + )×7
=1×7
=7
⑤( )×4.5
= ×4.5+ ×4.5
=0.9+1
=1.9
⑥15×
=6+25
=31
16.【答案】(1)×+÷
=×+×4
=×(+4)
=×
=
(2)+÷+
=+×4+
=×(1+4+1)
=×6
=
(3)(+-)×24
=×24
=6
(4)10÷+×4
=10×4+×4
=(10+)×4
=×4
=41
17.【答案】(1)÷(-0.25)
=÷(-)
=÷
=×
=
(2)×÷÷
=×××
=(×)×(×)
=×
=
(3)÷(×)×
=÷×
=×6×
=
18.【答案】(1)解:÷×
=××
=
(2)解:÷(+)
=÷
=×
=
(3)解:(7-)×
=7×-×
=-
=
=2
(4)解:÷6+×
=×+×
=×(+)
=×
=
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