756 = 700 + 50 + ….. = 7 x 100 +……. x 10 + 6 b) 862 = …….. x 100 + …….. x 10 + 2 4 x 2 + 4 x 5 + 4 =…………………….. a x 7 + a x 2 + a =……………………. c) abc = ….. … x 100 +……… x 10 + …….
K
Khách
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NK
15
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NN
20
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DT
6
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NB
23
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11 tháng 10 2021
1800 - 1400 + 900 = 1300
10136 - 600 x 6 = 6536
53111 - 10000 : 2 = 48111
( 39341 - 18000 ) x 3 = 64023
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756 = 700 + 50 + 6 hoặc 7 x 100 + 5 x 10 + 6 x 1
862 = 8 x 100 + 6 x 10 + 2
HT