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9900 : 36 - 15 x 11
= 275 - 165
= 110
9700 : 100 + 36 x 12
= 97 + 432
= 529
( 15792 : 336 ) x 5 + 27 x 11
= 47 x 5 + 297
= 235 + 297
= 532
( 160 x 5 - 25 x 4 ) : 4
= ( 800 - 100 ) : 4
= 700 : 4
= 175
1036 + 64 x 52 - 1827
= 1036 + 3328 - 1827
= 4364 - 1827
= 2537
215 . 869 + 215 . 14
= 215 . ( 869 + 14 )
= 215 . 883
= 189945
53 x (13+ m ) = 53 x ( 13 + 27 ) = 53 x 40 = 2120
`@` `\text {Ans}`
`\downarrow`
`a)`
\(x \times 27 + x \times 83 = 23400\)
`x \times (27 + 83) = 23400`
`x \times 110 = 23400`
`x = 23400 \div 110`
`x = 2340/11`
Vậy, `x = 2340/11`
`b)`
`x \times 153 - x \times 53 = 7600`
`x \times (153 - 53) = 7600`
`x \times 100 = 7600`
`x = 7600 \div 100`
`x = 76`
Vậy, `x = 76.`
(145 x 99 + 145 ) - ( 143 x 102 – 143 × 2 ) + 54 x 47 - 47 x 53 - 20 - 27
= 145 × (99 + 1) – 143 × (102 – 2) + 47 × (54 – 53) – (20 + 27)
= 145 × 100 – 143 × 100 + 47 × 1 – 47
= 100 × (145 – 143) + (47 – 47)
= 100 × 2 + 0
= 200
= 145 x (99+1) - 143 x ( 102-2) + 47 x ( 54 - 53) -20-27
= 145 x 100 - 143 x 100 + 47 x 1 -20-27
= 100 x ( 145 - 143 ) + 47 - 20 - 27
= 200 + 47 - 20 - 27
= 200
(145 x 99 + 145 ) - ( 143 x 102 – 143 × 2 ) + 54 x 47 - 47 x 53 - 20 - 27
= 145 × (99 + 1) – 143 × (102 – 2) + 47 × (54 – 53) – (20 + 27)
= 145 × 100 – 143 × 100 + 47 × 1 – 47
= 100 × (145 – 143) + (47 – 47)
= 100 × 2 + 0
= 200
(145 x 99 + 145 ) - ( 143 x 102 – 143 × 2 ) + 54 x 47 - 47 x 53 - 20 - 27
= 145 × (99 + 1) – 143 × (102 – 2) + 47 × (54 – 53) – (20 + 27)
= 145 × 100 – 143 × 100 + 47 × 1 – 47
= 100 × (145 – 143) + (47 – 47)
= 100 × 2 + 0
= 200
x+27=201-53-15
x+27=133
x=133-27
x=106
vay x=106
k nha
\(x\div15+x+27+53=201\)
\(x\div15+x+27=201-53\)
\(x\div15+x+27=148\)
\(x\div15+x=148-27\)
\(x\div15+x=121\)
x : 16 = 121 => x = 121 x 16 = 1936
\(x\div\left(15+1\right)=121\)