Mathematics
Grade-1
Easy
Question
Count the party hats by 10s.
![](data:image/png;base64,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)
- 50
- 100
- 40
- 80
Hint:
Multiplication is a method of finding the product of two or more numbers.
The correct answer is: 40
Here, we have to find the total number of party hats.
Number of party hats in 1 group = 10.
Total number of groups = 4 .
Total number of party hats = 10 × 4 .
= 40 .
Hence,the correct option is (b).
Here, count by 10s means 10, 20 , 30 , 40 . . .