21. Mental Mathematics
Solve these problems.
1. How many days are there in two weeks?
2. How many wheels are there in nine bicycles?
3. How many half hours make a day?
4. In 8000, what is the place value of eight?
5. If you add all the dots on a dice except three,
what number will you get?
6. How many quarters are there in an hour?
7. How many times does 'l' appear when
you write 18 in Roman numerals?
8. Is the number 350 odd or even?
Answers
Answered by
6
Answer:
1. 14
2. 18
3. 48
4.thousands
5. 18
6. 4
7. 3
8. even
Answered by
2
Answer:
1.14 DAYS
2.18 WHEELS
3.48 HALF HOURS
4.8000
5.21
6.4
7.3
8.EVEN
Step-by-step explanation:
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