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2023-12-13 20:48:45
2023-12-13 20:40:42
giai
so hang 2 lo dat la
2 x 4 = 8 (hang)
so cay con 8 hang la
101 x 8 = 808 (cay con)
dap so :808 cay con
2023-12-13 20:35:29
a) cac goc vuong la : adc,abc
b) cac goc khong vuong la : bcd,dab
2023-12-13 20:32:14
a) 79 + 34 - 19
= 113 - 19
= 94
b) 563 - 99 = 464
c) 221 x (43 - 39)
= 221 x 4
= 884
d) 936 : 3 = 312