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37064 - 64 x ( 82 + 42966 : 217 )
= 37064 - 64 x ( 82 + 198 )
= 37064 - 64 x 280
= 37064 - 17920
= 19144
b) 320 - ( 120 x 5 + 95, 25 + 5,25 ) + 864 : 12 x 12,5
= 320 - ( 600 + 95, 25 + 5,25 ) + 864 : 12 x 12,5
= 320 - ( 695.25 + 5,25) + 72 x 12,5
= 320 - 700.5 + 900
= -380,5 + 900
= 520
37064 - 64 x ( 82 + 42966 : 217 )
= 37064 - 64 x ( 82 + 198 )
= 37064 - 64 x 280
= 37064 - 17920
= 19144
b) 320 - ( 120 x 5 + 95, 25 + 5,25 ) + 864 : 12 x 12,5
= 320 - ( 600 + 95, 25 + 5,25 ) + 864 : 12 x 12,5
= 320 - ( 695.25 + 5,25) + 72 x 12,5
= 320 - 700.5 + 900
= -380,5 + 900
= 520
chúc bn hok tốt @_@
a. 64 x 25 + 35 x 25 + 25
= 64 x 25 + 35 x 25 + 25 x 1
= 25 x ( 64 + 35 + 1 )
= 25 x 100
= 2500
b. 58 x 42 + 32 x 8 + 5 x 16
c. ( 42 x 43 + 57 x 43 + 43 ) - 360 : 4
= 42 x 43 + 57 x 43 + 43 x 1 - 90
= 43 x ( 42 + 57 +1 ) - 90
= 43 x 100 - 90
= 4300 - 90
= 4210
d. 456 : 2 x 181456 : 3 - 102
Trả lời:
a,\(64\times25+35\times25+25\)
\(=25\times\left(64+35+1\right)\)
\(=25\times100\)
\(=2500\)
b,\(58\times42+32\times8+5\times16\)
\(=2436+256+80\)
\(=2772\)
c,\(\left(42\times43+57\times43+43\right)-360\div4\)
\(=43\times\left(42+57+1\right)-90\)
\(=43\times100-90\)
\(=4300-90\)
\(=4210\)
d,\(456\div2\times181456\div3-102\)
\(=228\div3\times181456-102\)
\(=76\times181456-102\)
\(=13790656-102\)
\(=13790554\)
a)364+225+436=(364+436)+225=800+225=1025
b)125x14x25x8x4=(125x8)x(25x4)x14=1000x100x14=100000x14=1400000
câu c bạn ra đề sai rồi để mk sửa lại rồi làm luôn.
sửa c) 36x49+64x49=(36+64)x49=100x49=4900
tk nha
\(364+225+436\)
\(=\left(364+436\right)+225\)
\(=800+225\)
\(=1025\)
19,7 : 0,1 x 4 x 0,25
=(19,7 : 0,1) x (4 x 0,25)
=197 x 1
=197
mình trả lời ý a
64 x 25 +35 x 25 +25 x 1
= 25 x ( 64 + 35 + 1 )
= 25 x 100
= 2500
a) 81 + 243 + 19 = (81 + 19) + 243
= 100 + 143 = 243
b) 168 + 79 + 132 = (168 + 132) + 79
= 300 + 79 = 379
c) 5 x 25 x 2 x 16 x 4 = (5 x 2) x (25 x 4) x 16
= 10 x 100 x 16 = 16000
d) 32 x 47 + 32 x 53 = 32 x (47 + 53)
= 32 x 100 = 3200
e) 26 + 27 + 28 + 29 + 30 + 31 + 32 = (26 + 32) + (27 + 31) + (28 + 30) + 29
= 58 + 58 + 58 + 29
= 58 x 3 + 29 = 174 + 29 = 203
=2x2/1x3 x 3x3/2x4x4/3x5 x ... x 11x11/10x12
=2x2x3x3x4x4x...x11x11/1x3x2x4x3x5x...x10x12
= 2x3x4x...x11)x(2x3x4x...x11)/(1x2x3x4x...x11)/(1x2x3x...x10)x(2x3x4x...x11)
=11x2/1x12
=22/12
=11/6
4/3x9/8x16/15x...x121/120=\(\dfrac{2^2}{1\cdot3}\)x\(\dfrac{3^2}{2\cdot4}\)x\(\dfrac{4^2}{3\cdot5}\)x...x\(\dfrac{11^2}{10\cdot12}\)=\(\dfrac{2}{3}\)x\(\dfrac{11}{10}\)=\(\dfrac{11}{15}\)
120 x 64 + 320 - 25 x 4 x 16 = 120 x 4 x 16 + 20 x 16 - 100 x 16
= 480 x 16 + 20 x 16 - 100 x 16
= 16 x (480 + 20 - 100)
= 16 x 400
= 6400