简算:(7.5+7.5+7.5+7.5)*125*8
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/09/04 19:13:50
简算:(7.5+7.5+7.5+7.5)*125*8
马上要,
10又1/4+3又5/6-1又1/3-7又1/4-1又2/3(简算)
7.5*4算简算吗?
马上要,
10又1/4+3又5/6-1又1/3-7又1/4-1又2/3(简算)
7.5*4算简算吗?
1.(7.5+7.5+7.5+7.5)*125*8= (7.5+7.5+7.5+7.5)*(125*8)
= (7.5+7.5+7.5+7.5)*1000
=30*1000
=30000
注意:切记25*4=100
125*8=1000
2.10又1/4+3又5/6-1又1/3-7又1/4-1又2/3
=10又1/4-7又1/4+3又5/6-(1又1/3+1又2/3)
=3+3又5/6-3
=3又5/6
= (7.5+7.5+7.5+7.5)*1000
=30*1000
=30000
注意:切记25*4=100
125*8=1000
2.10又1/4+3又5/6-1又1/3-7又1/4-1又2/3
=10又1/4-7又1/4+3又5/6-(1又1/3+1又2/3)
=3+3又5/6-3
=3又5/6