Applying Distributive property of multiplication over addition to simplify: 

$(18\times 50)+(18\times 9)$

=$18\times (50+9)=18\times 59$

50 Tens 5 Ones = $50\times 10+5\times 1=500+5=505$

4 Hundreds, 9 Tens 9 Ones = $4\times 100+9\times 10+9\times 1=400+90+9=499$

$505>499$

Hence, 50 Tens 5 Ones is greater.

The divisibility rule for a number to be divisible by 4 is that the last 2 digits of the number should be divisible by 4.

For e.g:  In 1328 the last 2 digits = 28, which is exactly divisible by 4.

$\to$ $1328÷4=332$, with a remainder of 0.

Hence 1328 is exactly divisible by 4.

A number is divisible by 6 if it is divisible by both 2 and 3.  

In 7245: sum of the digits is = 7 + 2 + 4 + 5 = 18, which is divisible by 3.

If a number is even, it is divisible by 2. 

Here 7245 is an odd number, hence it is not divisible by 2.

$\therefore$  7245 is not divisible by 6.

28 = 7 x 4

Divisor is a number by which another number is divided.

Here, 38 is divided by 9.

Hence, 9 is the divisor.

Subtraction means to take away or remove. We count backwards while subtracting. Hence, on the number line, we move left.

For e.g: $9-3=6$

$11112\text{/}1\text{/}111\text{/}3\text{/}2\text{/}2\text{/}1\underset{–}{-789}2432$ 

$156\underset{–}{+35}91$

The value is 91.

Given:

Number of students going on a trip = $88$

Number of school buses = $4$

If there are an equal number of students in each bus, then

The number of students in each bus = $88÷4=22$

There are 22 students in each bus.