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= 232x 98 -123 x 98
= 98 x ( 232 - 123)
=98 x 109
=10682 Hình như sai đề bài à
= 232 x 98 - 123 x 98
= 98 x ( 132 - 123 )
= 98 x 109
= 10682
~~~~hok tốt~~~~
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a)63x113+36x113+113
=113x(36+63+1)
=113x100
=11300
b)115x(36+62)-15x(62+36)
=115x98-15x98
=11270-1470
=9800
a,63.113+36.113+113
=63.113+36.113+113.1
=(63+36+1).113
=100.113
=11300
b,115.(36+62)-15.(62+36)
=115.98-15.98
=(115-15).98
=100.98
=9800
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`@` `\text {Ans}`
`\downarrow`
`A,`
`248 \times (36 + 62) - 148 \times (62 + 36)`
`= (36+62) \times (248 - 148)`
`= 98 \times 100`
`= 9800`
`B,`
`107 \times 195 + 107 \times 175 - 107 \times 150`
`= 107 \times (195 + 175 - 150)`
`= 107 \times 220`
`= 23540`
`C,`
`(2020 \times 99 + 2020) - (2019 \times 101 - 2019)`
`= 2020 \times (99+1) - 2019 \times (101-1)`
`= 2020 \times 100 - 2019 \times 100`
`= 100 \times (2020 - 2019)`
`= 100 \times 1`
`= 100`
A. 248x(36+62)-148x(62+36)
=(36+62)x(248-148)
=98x100
=9800
B.107x195+107x175-107x150
=107x(195+175-150)
=107x220
=23540
C.(2020x99+2020)-(2019x101-2019)
=(2020x(99+1))-(2019x(101-1))
=(2020x100)-(2019x100)
=202000-201900
=100
![](https://rs.olm.vn/images/avt/0.png?1311)
a, = 113 x (54+45+1) = 113 x 100 = 11300
b, = (36+62) x (117-17) = 98 x 100 = 9800
k mk nha
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a, ( 532 x 7 - 266 x 14 ) x ( 532 x 7 + 266 )
= 3724 - 3714 x 3724 + 266
= 0 x 3990
= 0
b, 117 x ( 36 + 62 ) - 17 x ( 62 + 36 )
= 117 x 98 - 17 x 98
= 11466 - 1666
= 9800
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 54x113+45x113+113 b)117x(36+62) -17x(62+36)
=(54+45+1)x113 =117x98-17x98
= 100x113 =(117-17)x98
= 11300 =100x98
=9800
a,54 x 113 + 45 x 113 + 113
=(54 + 45 +1) x 113
=100 x 113 = 11300
![](https://rs.olm.vn/images/avt/0.png?1311)
a) = 117 x 100 - 17 x 100
= ( 117 - 17 ) x 100
= 100 x 100
= 10000
b) ( 532 x 7 - 266 x 14 ) x ( 532 x 7 + 266 )
= 532 x 7 - 266 x ( 2 x 7 ) x 3990
= 532 x 7 - 266 x 2 x 7 x 3990
= (532 x 7 - 532 x 7) x 3990
= 0 x 3990
= 0
c) 506 x 5 + 1012 + 253 x 6
= 506 x 5 + (506 x 2) + 253 x ( 2 x 3 )
= 506 x 5 + 506 x 2 + 253 x 2 x 3
= 506 x 5 + 506 x 2 + 506 x 3
= 506 x ( 5 + 2 + 3 )
= 506 x 10
= 5060
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a.245 x ( 327-18-9) = 245 x 300 = 73500
b. (462 - 62) x 4 = 1600
c. 900 : 9 = 100
d. (12+20) : 4 = 8
245x327-245x18-9x245 462 x 4 - 62 x 4
=245x(327-18-9) = ( 462 - 62) x 4
=245x300 = 400 x 4
=73500 = 1600
35 : 7 - 21 : 7 ( 25 x 36 ) : 9
= ( 35 - 21) : 7 = 900 : 9
= 14 : 7 = 100
= 2
12 : 4 + 20 : 4
= ( 12 + 20 ) : 4
= 32 : 4
= 8
Giải :
118 x ( 36 + 62 ) - 18 x ( 62 + 36 )
= 118 x 36 + 118 x 62 - 18 x 62 - 18 x 36
= ( 118 - 18 ) x 36 + ( 118 - 18 ) x 62
= 100 x 36 + 100 x 62
= 100 x ( 36 + 62 )
= 100 x 98
= 9800
what????????????????