63 tk nha

9 x 7 = 63 nhé

63

k nha

9 x 7 = 63 

9.1+9.7+9.2

=9.(1+7+2)

=9. 10

=  90

9x1+9x7+9x2

=9(1+7+2)

=9x10

=90

tíc mình nha

9x7=63

63:9=7

9.7=63

63:9=7

9x9=81

9x8=72

9x7=63

9*9=81

9*8=72

9*7=63

9x9=81

9x7=63

9x4=36

8x3=24

9 x 9 = 81

9 x 7 = 63

9 x 4 = 36

8 x 3 = 24

nhớ k nha

[ 9x7+8x9-15x9] : [ 2+3+4+5+.....+18+19+20]

= 63 + 72 - 135 : [1+2+3+4+5+....+18+19+20]

= ( 135 - 135 ) : [ 1+2+3+4+5+....+18+19+20]

= 0 : [ 1+2+3+4+5+...+18+19+20]

= 0

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bị sao d

9;18;27;36;45;54;63;72;81

8

18

27

36

45

54

63

72

81