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19 x 64 + 76 x 34 - 25 x 32
Làm gấp nha
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b) 35 x 24 + 35 x 76 +55 x 19 +55 x 91
= 35 x ( 24 + 76 ) + 55 x ( 19 + 91 )
= 35 x100 +55 x 100
= 100 x ( 55 + 35 )
= 90 x 100 =9 000
c) \(6\cdot25\cdot4+4\cdot19\cdot6-2\cdot14\cdot12\)
\(=24\cdot25+24\cdot19-24\cdot14\)
\(=24\left(25+19-14\right)\)
\(=24\cdot30=720\)
d) \(19\cdot64+76\cdot34\)
\(=76\cdot19+76\cdot34\)
\(=76\left(19+34\right)=76\cdot53=4028\)
a) 2 x 16 x 50 x 25
= ( 2 x 50 ) x ( 16 x 25 )
= 100 x 400
= 40 000
\(78-\left(x-25\right).3\frac{1}{3}=73\)
\(78-\left(x-25\right)\cdot\frac{10}{3}=73\)
\(\left(x-25\right)\cdot\frac{10}{3}=78-73\)
\(\left(x-25\right)\cdot\frac{10}{3}=5\)
\(x-25=5:\frac{10}{3}\)
\(x-25=1,5\)
\(x=25+1,5=26,5\)
\(19\cdot64+76\cdot34\)
\(=19\cdot64+19\cdot4\cdot34\)
\(=19\cdot64+19\cdot136\)
\(=19\cdot\left(64+136\right)\)
\(=19\cdot200\)
\(=3800\)
19 x 64 + 76 x 34
= 38 x 32 + 38 x 68
= 38 x ( 32 + 68)
= 38 x 100
= 3800
\(34\times76+66\times110+34\times34\)
\(=34\times\left(76+34\right)+66\times110\)
\(=34\times110+66\times110=110\times\left(34+66\right)=110\times100=110000\)
34 x 76 + 66 x 110 + 34 x 34
= 34 x ( 76 + 34 ) + 66 x 110
= 34 x 110 + 66 x 110
= 110 x ( 34 + 66 )
= 110 x 100
= 11 000
=))
Ta có : 19 x 64 + 76 x 34
= 19 x 64 + 19 x 4 x 34
= 19 x 64 + 19 x 136
= 19 x (64 + 136)
= 19 x 200
= 3800
19 x 64 + 76 x 34
= 38 x 32 + 38 x 68
= 38 x ( 32+68)
= 38 x 100
3800
a) 19 x 64 + 76 x 34 = 19 x 64 + 19 x 4 x 34 = 19 x (64 + 4 x 34) = 19 x 200 = 3800
b) 35 x 12 + 65 x 13 = 35 x 12 + 65 x 12 + 65 = 12 x (35 + 65) + 65 = 12 x 100 + 65 = 1265
c) 136 x 68 + 16 x 272 = 136 x 68 + 16 x 2 x 136 = 136 x (68 + 16 x 2) = 136 x 100 = 13600
a) 19 . 64 + 76 .34 = 38. 32 + 38 . 68
= 38 . (32 + 68) = 38 .100 = 3800
b) 35 . 12 + 65 . 13 = 35 . 12 + 65 . (12 + 1)
= 35 . 12 + 65 . 12 + 65 = 12 . (35 + 65) + 65
= 1200 + 65 = 1265.
c) 136 . 68 + 16 . 272 = 136 . 68 + 32 .136
= 136 . (66 + 32) = 136 . 100 = 13600
k mik nha!
a,64 x 25 + 35 x 25 +25=25.(64+35+1)=25.100=2500
b) 58 x 42 + 32 x 8 + 5=2436+256+5=2697
c) A =1 +2+3+4+...+100=(100+1)x[(100-1):1+1]:2=5050
\(64\times25+35\times25+25\)
\(=25\times\left(64+35+1\right)\)
\(=25\times100\)
\(=2500\)
3,2 + 4,65 : 1,5
=3,2+3,1
=6,3
347 + 418 + 123 + 12
=(347+123)+(418+12)
=470+430
=900
34 x 35 + 35 x 38 + 65 x 40 + 65 x 32
=35*(34+38)+65*(32+40)
=35*72+65*72
=72*(35+65)
=72*100
=7200
19 x 16 x 4 + 76 x 34
=76*16+76*34
=76*(16+34)
=76*50
=3800
136 x 68 + 16 x2 x 136
=136*68+32*136
=136*(68+32)
=136*100
=13600
125 x 25 + 125 x 74 + 125
=125*(25+74+1)
=125*100
=12500
19 x 64 + 16 x 34 - 25 x 32
= 1216 + 544 - 800
= 672 + 800
= 1472