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分数乘除法计算题突破(专项训练)数学六年级上册苏教版
1.下面各题怎样简便就怎样算.
① × - ÷
②1- ÷ -
③( + × )÷
④ ÷[( + )×2]
⑤ ×58+42÷8
⑥36×( + - )
2.怎样算简便就怎样算.
(1)
(2)13 × +6 ÷16
(3)99×
3.计算(能简算的要简算).
(1)( ﹣ )×18
(2) ÷ ÷
(3)2.6× +2.4÷
(4)1﹣ ÷( + )
4.用你喜欢的方法计算
(1)
(2)
(3)
5.计算下面各题,能简便的要简便计算。
① ÷ ×
②3.18- -
③ ×( + )÷1.5
④2.8÷ +12.2×
⑤[0.7-( - )]÷
6.计算下面各题.
(1)( )×15×17
(2)[1﹣( )]×
(3)
7.脱式计算。(能简算的要用简便方法计算)
①24×( )
②30.8÷[14-(9.85+1.07)]
③
④10÷ + ×45
⑤(10-6.76)÷1.2
⑥34.52-17.87-12.13
8.计算,怎样简便就怎样计算.
(1)[ +( ﹣ )]÷34
(2)14.82﹣6.79+2.18﹣3.21
(3)69×
(4)(2﹣ × )÷
9.怎样算简便就怎样算.
① × ﹣ ÷
②4﹣ ﹣
③ ×58+ ×41+
④ × × ﹣
⑤ × + ÷
⑥ ÷[( ﹣ )÷ ]
10.计算,能简便计算的用简便方法计算.
(1)87×
(2) ÷0.6×
(3)3.7× +6.3÷
(4)20÷[( + )× ]
11.计算下面各题。(能简算的要简算)
(1) × +
(2)( + )×24
(3) ×99+
(4)2- ×
12.计算下面各题,能简算的要用简便方法计算.
(1) × + ÷
(2) ÷[ ÷( ﹣ )]
(3)( + ﹣ )×24
13.下面各题,怎样算简便就怎样算.
①
②
③
④
⑤
⑥
14.下列各题怎样简便就怎样算.
(1)6+3÷
(2)24×( + + )
(3) ÷5+ ×
(4) ×0.375÷
15.计算,能简算的要简算.
(1) ×12×
(2)( + )÷
(3)72× +
16.计算下面各题,能简算的要简算.
① ×15+ ×4
② ×
③(1 ×0.6)
④6 ×
⑤ ×( )
⑥[1﹣( )]
17.下面各题能简算的要用简便方法计算.
(1)20.3﹣6.98﹣3.02
(2)8×669×125
(3)( )×24
(4) ÷( +1﹣ )
18.下面各题怎样简便就怎样计算。
(1)(1- )× +
(2) + ÷ ×
(3)( - - )×24
(4)1.85× +1.15× -
答案解析部分
1.【答案】① × ﹣ ÷
= × ﹣ ×
=( ﹣ )×
=2×
=
②1﹣ ÷ ﹣
=1﹣ ﹣
=1﹣( + )
=1﹣1
=0
③( + × )÷
=( + )÷
= ×
=
④ ÷[( + )×2]
= ÷[ ×2]
= ÷
=
⑤ ×58+42÷8
=(58+42)×
=100×
=12.5
⑥36×( + ﹣ )
=36× 36× ﹣36×
=24+6﹣9
=21
2.【答案】(1)
=24× +24× +24×
=9+4+4
=17
(2)13 × +6 ÷16
=13 × +6 ×
=(13 +6 )×
=20×
=
(3)99×
=(98+1)×
=98× +1×
=97+
=97
3.【答案】(1)( ﹣ )×18
= ×18﹣ ×18
=15﹣6
=9
(2) ÷ ÷
= ×
=
(3)2.6× +2.4÷
=2.6× +2.4×
=(2.6+2.4)×
=5×
=7
(4)1﹣ ÷( + )
=1﹣ ÷
=1﹣
=
4.【答案】(1)
(2)
(3)
5.【答案】① ÷ ×
=××
=
②3.18--
=3.18-(+)
=3.18-1
=2.18
③×(+)÷1.5
=×(+)÷
=××
=
④8÷+12.2×
=8×+12.2×
=(2.8+12.2)×
=15×
=18
⑤[0.7-(-)]÷
=[-(-)]÷
=[-]÷
=(-)×
=×
=
6.【答案】(1)( )×15×17
= ×15×17+ ×15×17
=17+30
=47
(2) [1﹣( )]×
=[1﹣ ]×
= ×
=
(3)
= × + ×
=( + )×
= ×
=
7.【答案】①24×()==16-4+3=15② 30.8÷[14-(9.85+1.07)]=30.8÷(14-10.92)=30.8÷3.08=10③====④=45+7.5=52.5⑤(10-6.76)÷1.2=3.24÷1.2=2.7⑥34.52-17.87-12.13=34.52-(17.87+12.13)=34.52-30=4.52
8.【答案】(1) [ +( ﹣ )]÷34
=[ + ]÷34
= ÷34
=
(2)14.82﹣6.79+2.18﹣3.21
=(14.82+2.18)﹣(6.79+3.21)
=17﹣10
=7
(3)69×
=(68+1)×
=68× +1×
=13+
=13
(4)(2﹣ × )÷
=(2﹣ )÷
= ÷
=
9.【答案】① × ﹣ ÷
=1﹣
=
②4﹣ ﹣
=4﹣( + )
=
③ ×58+ ×41+
= ×(58+41+1)
= ×100
=12.5
④ × × ﹣
= ﹣
=
⑤ × + ÷
= +
=
⑥ ÷[( ﹣ )÷ ]
= ÷[ × ]
= ×5
=4
10.【答案】(1)87×
=(86+1)×
=86× +1×
=3+
=3
(2) ÷0.6×
= ×
=
(3)3.7× +6.3÷
=3.7× +6.3×
=(3.7+6.3)×
=10×
=12
(4)20÷[( + )× ]
=20÷[ × ]
=20÷
=80
11.【答案】(1)×+
=+
=
=
(2)(+)×24
=×24+×24
=16+15
=31
(3)×99+
=×(99+1)
=×100
=16
(4)2-×
=2-
=1
12.【答案】(1) × + ÷
= × + ×
=( + )×
=1×
=
(2) ÷[ ÷( ﹣ )]
= ÷[ ÷ ]
= ÷
=
(3)( + ﹣ )×24
= ×24+ ×24﹣ ×24
=18+12﹣20
=10
13.【答案】① 2- ÷ - = 2- - =2-( + )=2﹣1=1②+ ÷3+ = + + =1+ =1 ③= = = ④= = =1× = ⑤×13+ = ×(13+1)= ×14=8⑥= = = =
14.【答案】(1)解:6+3÷
=6+18
=24
(2)解:24×( + + )
=24× +24× +24×
=9+4+10
=23
(3)解: ÷5+ ×
= × + ×
=( + )×
=1×
=
(4)解: ×0.375÷
= ÷
=
15.【答案】(1) ×12×
=3×
=
(2)( + )÷
=( + )×
= × + ×
= +1
=1
(3)72× +
=(72+1)×
=73×
=71
16.【答案】① ×15+ ×4
= ×(15+4)
= ×19
=3
② ×
=
=
③(1 ×0.6)
=(1﹣0.1)
=0.9
=1.65
④6 ×
=6﹣
=6﹣( + )
=6﹣2
=4
⑤ ×( )
= ×
= ﹣
=
⑥[1﹣( )]
=[1﹣ ]
=
=
17.【答案】(1)解:0.3﹣6.98﹣3.02
=20.3﹣(6.98+3.02)
=20.3﹣10
=10.3
(2)解:8×669×125
=8×125×669
=1000×669
=669000
(3)解:( )×24
= ×24+ ×24+ ×24
=6+4+8
=18
(4)解: ÷( +1﹣ )
= ÷( ﹣ )
= ÷
=
18.【答案】(1)(1- )× +
= × +
= +
=
(2) + ÷ ×
= + × ×
= +
=
(3)( - - )×24
= ×24- ×24- ×24
=21-4-6
=11
(4)1.85× +1.15× -
= ×(1.85+1.15-1)
= ×2
=
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