Summer Clouds moderators
15/09/2017 at 08:49-
The number of 1-digit numbers is : (9 - 1) + 1 = 9
The number of 2-digit numbers is : (99 - 10) + 1 = 90
The number of 3-digit numbers is : (321 - 100) + 1 = 222
The number of digits she wrote is :
9 x 1 + 90 x 2 + 222 x 3 = 855
Selected by MathYouLike -
Vũ Trung Dũng 18/09/2017 at 05:53The number of 1-digit numbers is : (9 - 1) + 1 = 9
The number of 2-digit numbers is : (99 - 10) + 1 = 90
The number of 3-digit numbers is : (321 - 100) + 1 = 222
The number of digits she wrote is :
9 x 1 + 90 x 2 + 222 x 3 = 855
Answer : 855
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→இے๖ۣۜBoy™†hïếuGîa 16/09/2017 at 13:39
he number of 1-digit numbers is : (9 - 1) + 1 = 9
The number of 2-digit numbers is : (99 - 10) + 1 = 90
The number of 3-digit numbers is : (321 - 100) + 1 = 222
The number of digits she wrote is :
9 x 1 + 90 x 2 + 222 x 3 = 855
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Math You Like 16/09/2017 at 16:07The number of 1-digit numbers is : (9 - 1) + 1 = 9
The number of 2-digit numbers is : (99 - 10) + 1 = 90
The number of 3-digit numbers is : (321 - 100) + 1 = 222
The number of digits she wrote is :
9 x 1 + 90 x 2 + 222 x 3 = 855
Answer : 855