Observe the patterns and fill in the placeholders:

$$\begin{gathered} 1+2+3+4+5+6+7+8+9+10=55 \\ 11+12+13+14+15+16+17+18+19+20=155 \\ 21+22+23+24+25+26+27+28+29+30=255 \\ 51+52+53+54+55+56+57+58+59+60= \\ 101+102+103+104+105+106+107+108+109+110= \end{gathered}$$

What is hiding?

Write the numbers in order.

$12,14,16,18,$_____,_____,_____,_____,_____,_____,_____,$34$

Count in ten thousands.

$34,008, 44,008,$ _____, _____, _____, _____, _____

Recognize the rule and extend the pattern.

$11 15 19 23 27$_____, _____, _____.

 Make a number pattern of your choice.

Count in thousands.

$28,196, 29,196,$ _____, _____, _____, _____, _____

Which are the numbers with $7$ in ones place among $1-99$?

Make the pattern with numbers of your own choice

_____, _____, _____, _____, _____, _____.

Complete the pattern:

 Observe the pattern and write the next number.
$3, 6, 9, 3, 6, 9, 3$, ______

Count in hundreds:

$43,810, 43,910,$ _____, _____, _____, _____, _____

Number Patterns Let us look at some patterns with numbers. Fill the number in the blank space of each pattern.

 Observe the pattern and write the next number.
$2, 2, 4, 6, 6, 8, 10,$ _____

Make the pattern with numbers of your own choice

_____, _____, _____, _____, _____, _____.

Count in tens.

$2,385, 2,395,$ _____, _____, _____, _____, _____

Make the pattern with numbers of your own choice

_____, _____, _____, _____, _____, _____.

Identify the rule and fill in the blank.

$3, 6, 9, 12,$ _____, _____, _____.

Identify the rule and fill in the blank.

$0, 1, 1, 2, 3, 5, 8,$_____, _____, _____.