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?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/21 13:44:30
![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?](/uploads/image/z/745189-61-9.jpg?t=%E7%AE%80%E7%AE%97%EF%BC%9A%EF%BC%887.5%2B7.5%2B7.5%2B7.5%EF%BC%89%2A125%2A8%E9%A9%AC%E4%B8%8A%E8%A6%81%2C10%E5%8F%881%2F4%2B3%E5%8F%885%2F6-1%E5%8F%881%2F3-7%E5%8F%881%2F4-1%E5%8F%882%2F3%EF%BC%88%E7%AE%80%E7%AE%97%EF%BC%897.5%2A4%E7%AE%97%E7%AE%80%E7%AE%97%E5%90%97%EF%BC%9F)
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?
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?
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?
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
分解
7.5=2.5+2.5+2.5
(7.5+2.5)*3=30
30*125*8=30000
合并
(10又1/4-7又1/4)-(1又1/3-1又2/3)+3又5/6=3又5/6
(10又1/4-7又1/4)+[3又5/6-(1又2/3+1又1/3)}
=3+(3又5/6-3)
=3+5/6
=3又5/6
(7.5+7.5+7.5+7.5)*125*8
=7.5*4*1000
=30*1000
=30000
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
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