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=1918x2018-1918x57-2018x1918+2018x57
=(1918x2018-1918x2018)+57x(2018-1918)
=57x100=5700
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58 - 39 = 19
98 - 57 = 41
285 - 274 = 11
784 - 584 = 200
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225 x 17 - 17 x 125
= 17 x ( 225 - 125 )
= 17 x 100
= 1700
125 x 57 x 8
= ( 125 x 8 ) x 57
= 1000 x 57
= 57000
225 * 17 - 17 * 125 125 * 57 * 8
= 3825 - 2125 = 7125 * 8
= 1670 = 57000
thấy đúng thì k mik nha.
chúc bạn học giỏi.
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Bài làm:
Ta có: \(83.4+79.4+90.4+57\)
\(=252.4+57\)
\(=1008+57\)
\(=1065\)
Học tốt!!!!
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35+57-57*3:2
=35+57-171:2
=35+57-85,5
=92-85,5
=6,5
mk đầu tiên mà bạn
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5 x 1 = 5
5 x 2 = 10
8 x 8 = 64
100 x 100 = 1000
57 : 3 = 19
12 : 6 = 2
=57x100=5700
98 x 57 + 57 + 57
=(98x57)+57+57
=5700