六年级分数乘法分配律练习题及详解答案.docx
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六年级分数乘法分配律练习题及详解答案
分数乘法分配律练习题
(-)×60(+)×18
(-)×(+)×5
(+)×2790×(+)
(+)×25×(12+)
(-)×24×(++)
(48+)×(-)×20
(-)×18(+)×35
×(+)48×(++)
×+××-×
×6+×63×+×3
×+××-×
×7+×521×+×21
×101×78
×2837×
34××12
4×1025×8
3×25(+)×7×5
(-)×5×12(-)×6×18
×101-12×+
×19+23×+
详解答案
(-)×60(+)×18
=×60-×60=×18+×18
=35-12=3+16
=23=19
(-)×(+)×5
=×-×=×5+×5
=3-2=+1
=1=1
(+)×2790×(+)
=×27+×27=90×+90×
=24+4=10+21
=28=31
(+)×25×(12+)
=×25+×25=×12+×
=15+2=2+
=17=2
(-)×24×(++)
=×-×=24×+24×+24×
=-=7+20+18
==45
(48+)×(-)×20
=48×+×=×20-×20
=2+=7-4
=2=3
(-)×18(+)×35
=×18-×18=×35+×35
=15-10=7+15
=5=22
×(+)48×(++)
=×+×=48×+48×+48×
=+2=22+8+20
=2=50
×+××-×
=(+)×=×(-)
=1×=×1
==
×6+×63×+×3
=(+)×6=3×(+)
=1×6=3×1
=6=3
×+××-×
=(+)×=(-)×
=1×=×
==
×7+×521×+×21
=(+)×5=21×(+)
=1×5=21×1
=5=21
×101×78
=×(100+1)=×(77+1)
=×100+=×77+×1
=63+=6+
=63=6
×2837×
=×(27+1)=(35+2)×
=×27+×1=35×+2×
=5+=3+
=5=3
34××12
=(35-1)×=×(13-1)
=35×-1×=×13-×1
=34-=6-
=33=5
4×1025×8
=(4+)×10=(25+)×8
=4×10+×10=(25×8+)×8
=40+8=200+3
=48=203
3×25(+)×7×5
=(3+)×25=×7×5+×7×5
=3×25+×25=7+15
=75+20=22
=95
(-)×5×12(-)×6×18
=×5×12-×5×12=×6×18-×6×18
=35-12=90-60
=23=30
×101-12×+
=×(101-1)=(12+1)×
=×100=13×
=70=6
×19+23×+
=×(19+1)=(23+1)×
=×20=24×
=36=18