Question

answer all the question properly neat and clear.​

Answer 1

Answer:

$1. \: \: 9999 - 1000 = 8999$

Answer 2

Mental Maths

①Find difference between the smallest and largest four digit number.

The smallest four digit number= 1000

The largest four digit number= 9999

Their difference= 9999-1000= 8999

• Difference between the smallest 4 digit number and largest four digit number is 8999.

$\:$

②20 tens-15 tens=___ ones

20 tens=20 (2-tens place,0-ones place)

15 tens=15 (1-tens place,5-ones place)

There difference= 20-15=5

• 20 tens-15 tens= 5 ones

$\:$

③Subtract the following:

$\tt \: \: \: \: 860 \\ \tt \underline{ \: - 558} \\ \tt \: \: \: 302$

$\tt \: \: \: \: \: 924 \\ \tt \: \underline{ \: \: - 327} \\ \tt \: \: \: \: \: 597$

④Solve:-

In a gallery,there are 155 seats. If 86 seats are occupied, how many seats are vacant?

Total number of seats=155

No. of seats occupied=86

No. of seats vacant= 155-86= 69

• Total 69 seats are vacant from total 155 seats.

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