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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
a)
\(\frac{864\cdot48-432\cdot96}{864\cdot48\cdot432}=\frac{432\cdot2\cdot48-432\cdot96}{864\cdot48\cdot432}=\frac{432\cdot96-432\cdot96}{864\cdot48\cdot432}=\frac{0}{864\cdot48\cdot432}=0\)
Làm từng phần một nha =))
b)
\(\frac{16\cdot17-5}{16\cdot16+11}=\frac{16\cdot\left(16+1\right)-5}{16\cdot16+11}=\frac{16^2+16-5}{16^2+11}=\frac{16^2+11}{16^2+11}=1\)
@_@
a)1050:15-350:15+176=(1050-350):15+176=700:15+176=140/3+176=668/3
b)4320:9-8640:18+750=4320:9-8640:2:9+750=4320:9-4320:9+750=0+750=750
C)864*48-432*96=864.48-432.2.48=864.48-864.48=0
(864 x11 -432 x4 ) :[ 432 x (135-132) ]
=(9504-1728) : ( 432 x 3 )
=7776 : 1296
= 6
( click đúng nha bạn )
8) ((456.11 + 912).37) : 13 . 74
= [(456.11 + 456 . 2).37] : 13 . 74
= [456.(11 + 2).37] : 13 . 74
= 456 . 13 . 37 : 13 . 74
= 456 . 37 : 74
= 456 : ( 74 : 37 )
= 456 : 2
= 228
9) Ta có:
864 . 48 - 432 . 96
= 432 . 2 . 48 - 432 . 96
= 432 . 96 - 432 . 96
= 432 . ( 96 - 96 )
= 432 . 0
= 0
\(\Rightarrow\left(864.48-432.96\right):864.48.432\)
\(=0:864.48.432\)
\(=0\)
\(8,\left[\left(456.11+912\right).37\right]:13.74\)
\(=\left[\left(5016+912\right).37\right]:13.74\)
\(=\left(5928.37\right):13.74\)
\(=219336:13.74\)
\(=16872.74\)
\(=1248528\)
\(9,\left(864.48-432.96\right):864.48.432\)
\(=\left(41472-41472\right):864.48.432\)
\(=0:864.48.432\)
\(=0\)
a, (195 . 132 - 132 . 85) : 110
\(=132\left(195-85\right):110\)
\(=132.110:110\)
\(=132\)
432 x 2 x 48 - 432 x 96
___________________
432 x 2 : 48 x 432
432 x 96 - 432 x 96
= __________________
432 : 24 x 432
432 x ( 96 - 96 )
=______________
432 : 24 x 432
0
=_______________
432 : 24 x 432
=0