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(Repost) School is starting, and the teacher is giving each student 2 new pencils. She has 8 rows with 4 desks in each row. Which method (s) below will show her how many pencils she will need?
A. 2 x 8 + 16, 16 x 4
B. 2 x 4 + 8, 8 x 8
C. 4 x 8 + 32, 2 x 32
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A. Only method A
B. Only method A and B
C. Only method B and C
D. Only method A, B, and C

Respuesta :

A

2 x 8+16 = 32 16 x 4 = 64

B

2 x 4 +8 = 16 8 x 8 = 64

C

4 x 8 + 32 = 64  2 x 32 = 64

1  l l l l   8              5 l l l l     40

2 l l l l   16             6 l l l l     48

3 l l l l   24            7 l l l l      56

4 l l l l   32            8 l l l l      64

The teacher has 64 or more pencils to give out.

Hope this helps you choice your answer. :)

D.) only method A, B, and C,

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