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分数乘除法计算题(专项训练)数学六年级上册北师大版
1.计算,能简算的要简算
(1)101×
(2)7.2×+10.8×
(3) ×[÷(-)]
2.计算下面各题,能简算的要简便计算
①100×
②÷(-)
③24×(+-)
④0.75×+×
⑤12÷+×5
3.计算下面各题
(1) ×÷
(2) ÷÷
(3)6÷×
4.计算下面各题。
(1)
(2)
(3)
5.计算:
(1)
(2)
(3)
6.先口述运算顺序,再计算。
①
②
③
④
7.计算。
(1) × ×12
(2) ×15×
(3) ÷ ×
8.计算下列各题能简算的要简算。
(1) × + ×
(2)20×( - )×
9.怎样算简便就怎样算。
(1) × + ÷6
(2) ÷[ ×( - )]
(3)24× ×
(4)( + )×2.4
10.用你喜欢的方法计算下面各题。
①0.75× ÷4
② +6÷
③ - ÷
④2- ÷ ×
⑤ × - ÷
⑥ ÷( - × )
11.计算下面各题。
(1) ×21×
(2) ÷ ÷
(3)3× ÷
(4)15÷ ×
12.计算下面各题。
①200× ×
②
③
④ × ×68
⑤ × ÷
⑥ ÷ ÷
13.怎么简便怎么算。
①75×
② ×58+42÷8
③ × ×51×55
④
⑤23-
⑥ + ÷ +
14.计算下面各题,能简算的要简算。
(1)10÷ + ×3
(2)24×( )
(3) ×9.3+9.3×0.25
(4)
15.计算下面各题,能简算的就简算。
① + ÷
②
③2020×
④(+)×9×17
⑤ ×[1÷( + )]
16.用你喜欢的方法计算下面各题。
① × ×
② + × +
③( + )×1.8
④ ÷8- ×
⑤(0.75- )÷( + )
⑥26×
17.计算下面各题,能用简便算法的就用简便算法。
(1)( + )×
(2) ×13+ ×12
(3) ÷[( - )×4]
18.使用你喜欢的方法计算。
(1) × ÷
(2) ÷ + ×
(3)3.5÷ + ×
答案解析部分
1.【答案】(1)解:101×
=(102-1)×
=102× -1×
=97-
=
(2)解:7.2× +10.8×
= ×(7.2+10.8)
= ×18
=10
(3)解: ×[ ÷( - )]
= ×[ ÷ ]
= ×
=
2.【答案】解:①100×
=(99+1)×
=99× +1×
=98
② ÷( - )
= ÷
=
③24×( + - )
=24× +24× -24×
=30+4-3
=31
④0.75× + ×
= ×( + )
=
⑤12÷ + ×5
=12× +
=27
3.【答案】(1)解: ×÷
=×20
=
(2)解: ÷÷
=×2
=
(3)解:6÷×
=18×
=9
4.【答案】(1)解:
=
(2)解:
=××
=
(3)解:
=××
=
5.【答案】(1)解:××
=
(2)解:÷÷
=××
=
(3)解:÷×
=××
=
6.【答案】解:①先将除法变成乘法,再进行约分,最后进行计算
÷÷
=××
=;
②先将除法变成乘法,再进行约分,最后进行计算
×÷
=××
=;
③先计算乘法,再计算除法;
4÷(×)
=4÷
=8;
④先计算括号里面的除法,再计算括号外面的除法;
15÷(÷)
=15÷(×)
=15÷
=10。
7.【答案】(1)××12
=×12
=8
(2)×15×
=×
=2
(3)÷×
=×
=
8.【答案】(1)×+×
=×(+)
=×1
=
(2)20×(-)×
=20××
=1×
=
9.【答案】(1)×+÷6
=(+)×
=1×
=
(2)÷[×(-)]
=÷[×]
=÷
=
(3)24××
=24×(×)
=24×
=10
(4)(+)×2.4
=×2.4+×2.4
=1.6+0.4
=2
10.【答案】①0.75× ÷4
=÷4
=
②+6÷
=+
=7
③-÷
=-
=
④2-÷×
=2-×
=2-
=
⑤×-÷
=(-)×
=1×
=
⑥÷(-×)
=÷(-)
=÷
=8
11.【答案】(1)×21×
=15×
=
(2)÷÷
=÷
=12
(3)3×÷
=÷
=
(4)15÷×
=×
=10
12.【答案】①200××
=150×
=18.75
②
=×(×)
=×
=
③
=15××
=
④××68
=×68
=15
⑤ ×÷
=×
=
⑥÷÷
=××
=
=
13.【答案】①75×
=(74+1)×
=74×+1×
=9+
=
②×58+42÷8
=×(58+42)
=×100
=
③××51×55
=(×51)×(×55)
=9×15
=135
④(+)×24
=×24+×24
=18+20
=38
⑤23-×÷
=23-÷
=23-18
=5
⑥+÷+
=++
=
14.【答案】(1)10÷ + ×3
=10×+0.5
=17.5+0.5
=18
(2)24×( )
=24×+24×
=9+6
=15
(3) ×9.3+9.3×0.25
=9.3×(+)
=9.3×1
=9.3
(4) =×11+×11
=(+)×11
=1×11
=11
15.【答案】①+÷
=+3
=
②×-÷
=(-)×
=2×
=
③2020×
=2021×-1×
=2020-
=
④(+)×9×17
=×9×17+×17×9
=34+45
=79
⑤×[1÷(+)]
=×[1÷]
=×
=
16.【答案】①××
=×
=
②+×+
=++
=+(+)
=+1
=
③(+)×1.8
=×1.8+×1.8
=0.6+1
=1.6
④÷8-×
=×-×
=(-)×
=×
=
⑤(0.75-)÷(+)
=÷
=
⑥26×
=(25+1)×
=25×+1×
=9+
=
17.【答案】(1)( + ·)×
= × + ×
=1+
=
(2) ×3+ ×12
= ×(13+12)
= ×25
=17
(3) ÷[( - )×4]
= ÷[ ×4]
= ÷
=
18.【答案】(1)×÷
=×
=
(2)÷+×
=×(+)
=×1
=
(3)3.5÷+×
=(+)×
=10×
=6
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