a. 5 + 5 + 5 + 5 + 5 = 5 x 5 = 25
b. 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 = 3 x 10 = 30
a. 5 + 5 + 5 + 5 + 5 = 25
5 x 5 = 25
b. 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 = 30
3 x 10 = 30
Mk nhanh nhất đó
a. 5 + 5 + 5 + 5 + 5 = 25
5 x 5 = 25
b. 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 = 30
3 x 10 = 30
a.5+5+5+5+5=25
=5x5=25
b.3+3+3+3+3+3+3+3+3+3=30
=3x10=30
chuyển phép công thành phép nhân
a.5+5+5+5+5=25
= 5x 5
= 25
b.3+3+3+3+3+3+3+3+3+3=30
= 3 x 10
= 30
Ai tk cho mk mk tk lại !!!
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Thank your very much !!!
a.5+5+5+5+5=25
5x5=25
b3+3+3+3+3+3+3+3+3+3=30
3x10=30
a.5x5x5x5x5
5x5=25.
b.3x3x3x3x3x3x3x3x3x3
3x10=30.
Là như thế
Bg:
a) 5+5+5+5+5 =5.5 =25
b) 3+3+3+3+3+3+3+3+3+3 = 3.10 =30
5+5+5+5+5=5x5=25
3+3+3+3+3+3+3+3+3+3=3x10=30