用简便计算解决(有好几题,答出来了给悬赏) 小学举一反三B版四年级 速算与巧算(二)第21周 一定简便计算
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发布时间:2022-04-24 02:54
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热心网友
时间:2023-10-23 04:13
58500÷ 900=585/9=(630-45)/9=70-5=65
(702-213-414)÷ 3 =(702-627)/3=75/3=25
6237÷ 63=(630-63)/63=100-1=99
4×42 =4*(40+2)=4*40+4*2=160+8=168
53×99×25 =(50+3)*25*99=(1250+75)*99=1325*99=1325*(100-1)=132500-1325=131175
1111×9999=1111*(10000-1)=11110000-1111=11108889
864×37×27 =864*37*3*9=864*111*9=864*999=864*(1000-1)=864000-864=863136
125×798 =125*(800-2)=100000-250=99750
8÷7+9÷7+11÷7 =(8+9+11)/7=28/7=4
(10000-1000-100-10)÷10 =1000-100-10-1=1000-111=889
146×31÷ 73×75=2*73*31/73*75=2*75*31=150*(30+1)=4500+150=4650
5498-1928-387-1072-1613 =5498-(1928+1072)-(387+1613)=5498-2000-2000=1498
5723-(723-189)+576-(276-211)=(5723-723)+(189+211)+(576-276)=5000-400-500=5000-900=4100
99999×88888÷ 11111 =99999*8=(100000-1)*8=800000-8=799992
9999×2222+3333×3334=3333*6666+3333*3334=3333*(6666+3334)=3333*10000=33330000
热心网友
时间:2023-10-23 04:13
99999*88888/11111
=99999*8
=799992
热心网友
时间:2023-10-23 04:13
58500÷ 900=585/9=(630-45)/9=70-5=65
(702-213-414)÷ 3 =(702-627)/3=75/3=25
6237÷ 63=(630-63)/63=100-1=99
4×42 =4*(40+2)=4*40+4*2=160+8=168
53×99×25 =(50+3)*25*99=(1250+75)*99=1325*99=1325*(100-1)=132500-1325=131175
1111×9999=1111*(10000-1)=11110000-1111=11108889
864×37×27 =864*37*3*9=864*111*9=864*999=864*(1000-1)=864000-864=863136
125×798 =125*(800-2)=100000-250=99750
8÷7+9÷7+11÷7 =(8+9+11)/7=28/7=4
(10000-1000-100-10)÷10 =1000-100-10-1=1000-111=889
146×31÷ 73×75=2*73*31/73*75=2*75*31=150*(30+1)=4500+150=4650
5498-1928-387-1072-1613 =5498-(1928+1072)-(387+1613)=5498-2000-2000=1498
5723-(723-189)+576-(276-211)=(5723-723)+(189+211)+(576-276)=5000-400-500=5000-900=4100
99999×88888÷ 11111 =99999*8=(100000-1)*8=800000-8=799992
9999×2222+3333×3334=3333*6666+3333*3334=3333*(6666+3334)=3333*10000=33330000
热心网友
时间:2023-10-23 04:13
99999*88888/11111
=99999*8
=799992
热心网友
时间:2023-10-23 04:13
(54000+4500)÷900=60+5
(700-200-400+2-13-14)÷3=(100-25)÷3
(6300-63)÷63
4×40+4×2
1111×(10000-1)
125×(800-2)
(8+9+11)÷7
1000-100-10-1
146÷73×75×(30+1)=150×30+150
5498-(1928+1072)-(387+1613)=498
5723-723+189+211+576-276=5000+400+300
(100000-1)×8
3333×6666+3333×3334=3333×10000追问14×42 不是4×42 麻烦再解题一下
热心网友
时间:2023-10-23 04:13
(54000+4500)÷900=60+5
(700-200-400+2-13-14)÷3=(100-25)÷3
(6300-63)÷63
4×40+4×2
1111×(10000-1)
125×(800-2)
(8+9+11)÷7
1000-100-10-1
146÷73×75×(30+1)=150×30+150
5498-(1928+1072)-(387+1613)=498
5723-723+189+211+576-276=5000+400+300
(100000-1)×8
3333×6666+3333×3334=3333×10000追问14×42 不是4×42 麻烦再解题一下
热心网友
时间:2023-10-23 04:13
58500÷ 900=585/9=(630-45)/9=70-5=65
(702-213-414)÷ 3 =(702-627)/3=75/3=25
6237÷ 63=(630-63)/63=100-1=99
4×42 =4*(40+2)=4*40+4*2=160+8=168
53×99×25 =(50+3)*25*99=(1250+75)*99=1325*99=1325*(100-1)=132500-1325=131175
1111×9999=1111*(10000-1)=11110000-1111=11108889
864×37×27 =864*37*3*9=864*111*9=864*999=864*(1000-1)=864000-864=863136
125×798 =125*(800-2)=100000-250=99750
8÷7+9÷7+11÷7 =(8+9+11)/7=28/7=4
(10000-1000-100-10)÷10 =1000-100-10-1=1000-111=889
146×31÷ 73×75=2*73*31/73*75=2*75*31=150*(30+1)=4500+150=4650
5498-1928-387-1072-1613 =5498-(1928+1072)-(387+1613)=5498-2000-2000=1498
5723-(723-189)+576-(276-211)=(5723-723)+(189+211)+(576-276)=5000-400-500=5000-900=4100
99999×88888÷ 11111 =99999*8=(100000-1)*8=800000-8=799992
9999×2222+3333×3334=3333*6666+3333*3334=3333*(6666+3334)=3333*10000=33330000
热心网友
时间:2023-10-23 04:13
99999*88888/11111
=99999*8
=799992
热心网友
时间:2023-10-23 04:13
(54000+4500)÷900=60+5
(700-200-400+2-13-14)÷3=(100-25)÷3
(6300-63)÷63
4×40+4×2
1111×(10000-1)
125×(800-2)
(8+9+11)÷7
1000-100-10-1
146÷73×75×(30+1)=150×30+150
5498-(1928+1072)-(387+1613)=498
5723-723+189+211+576-276=5000+400+300
(100000-1)×8
3333×6666+3333×3334=3333×10000追问14×42 不是4×42 麻烦再解题一下