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Bạn đừng đăng câu hỏi linh tinh lên diễn đàn nhé.
~ Học tốt ~
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I dont rảnh!!
trước khi đăng hãy đọc nội quy ít nhất 100 lần
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(Nhân chia trước,cộng trừ sau)
\(=8+4+0,8+5\)
\(=12+0,8+5\)
\(=12,8+5\)
\(=17,8\)
8+8:2+4:5+5=8+4+\(\frac{4}{5}\)+5
=17+\(\frac{4}{5}\)=17\(\frac{4}{5}\)
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(8*7-16-5*8)*(1+2+3+4+5+6+7+8+9)
=(56-16-40)x(1+2+3+3+4+5+6+7+8+9)
=0x(1+2+3+4+5+6+7+8+9)
=0
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x + 1/4 = 5/8
x = 5/8 - 1/4
x = 3/8
3/5 - x = 3/8
x = 3/5 - 3/8
x = 9/40
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45x6=270
1+1+2+2+3+3+4+4+5+5+6+6+7+7+8+8+9+9
=(1x2)+(2x2)+(3x2)+(4x2)+(5x2)+(6x2)+(7x2)+(8x2)+(9x2)
=2+4+6+8+10+12+14+16+18
=6+6+8+10+12+14+16+18
=12+8+10+12+14+16+18
=20+10+12+14+16+18
=30+12+14+16+18
=42+14+16+18
=56+16+18
=72+18
=90
78:5=15(dư3)
45:5=9
x:5=25
x= 25x5
x= 125
tk nhé
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8 - 8 + 4 x 5 : 3 - 7 + 8 : 3
= 8 - 12 x 5 : 3 - 7 + 8 : 3
= 8 - 30 : 3 - 7 + 8 : 3
= 8 - 10 - 7 + 8 : 3
= 8 - 3 - 15 : 3
= 5 - 5
= 0
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8 x 4 + 8 x 3 - 8 x 2 + 8 x 5
= 8 x ( 4 + 3 - 2 + 5 )
= 8 x ( 7 - 2 + 5 )
= 8 x ( 5 + 5 )
= 8 x 10
= 80
= 40x5-8+4
= 40x5-4
= 196
5 x 5 x 8 - 8 + 4
= 25 x8 - 8 + 4
= 200 - 8 + 4
= 192 + 4
= 196