Respuesta :
Answer:
70
Step-by-step explanation:
i think
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Answer:70
Step-by-step explanation:
There are 10 rows of 7 3rd graders in each row
First you multiply the rows of girls by 7
4 x 7 is 28
Then you multiply the rows of boys by 7
6 x 7 = 42
You then add 28 and 42 which gives you 70
Therefore there are 70 3rd graders watching the science movie