Using examples of numbers less than one hundred, this presentation in Spanish provides a visual representation of arrays. It would be a great way to help learners understand the concept of tens and ones.

Students use construction paper to make a set of folding cards that initially hide a zero and then open to reveal a new number. They put their cards into sequential order and recognize numbers as they count by ten.

In this counting by groups worksheet, students practice counting by tens and then by ones. Students count the rows of ten and single cubes and then write how many cubes there are all together.

In this counting by grouping activity, students group shapes into tens by circling either groups of 5 or ten in ech. A reference website for additional resources is given.

In this counting by ten worksheet, students solve 6 problems in which the missing numbers in the number tracks are filled in to show counting backwards by ten. Number range is from 607 to 6.

In this mathematics worksheet, 1st graders identify two-digit numbers that show tens and ones. Then they write how many tens and ones there are and place the number in the boxes given.

In this counting worksheet, students complete a set of 5 problems, adding a "whole ten" number to a 3-digit number, then complete 6 additional problems, adding 90 to given numbers.

In this counting in tens worksheet, students fill in missing numbers in rows, counting in tens. A reference website for additional resources is given.

In this tens and ones activity, students count numbers of shapes in groups, writing the number of tens and ones in each set, then writing the total number beside each.

In this count back worksheet, learners count back in tens to fill in missing numbers in rows. An answer key and website reference are given.

For this counting on worksheet, students complete counting sequences going from a given number and counting on from ten to complete the sequence. An answer key is included.

In this counting from one to ten worksheet, learners fill in the missing numbers on the tens chart. Students fill in 7 answers.

Students practice their counting skills. In this counting lesson, students discover the Chisanbop method of counting which allows them to quickly count to 99 using their hands.

In this tens worksheet, students solve 8 problems by counting by tens. Each problem has a picture of a different number of marble bags. Students solve the problems with the understanding that each marble bag contains 10 marbles.

In this place-value instructional activity, students count the number of tens and ones, write out each value, and add them up. Students complete six problems like this, and 12 more where they add the two numbers together.

In this regrouping numbers worksheet, students learn to regroup numbers by writing the tens and ones for each number set and then writing the number. Students finish with one test prep question using regrouping.

In this counting back in tens worksheet, students count down in tens from one number given to another. A website reference for additional activities is given.

In this counting backwards in tens worksheet, students practice counting down in tens in 4 rows of numbers. Students count down in tens from 50 to 0, 70 to 20, 90 to 40 and 60 to 10.

For this counting backwards worksheet, 2nd graders study and review a chart to assist them in solving 4 subtraction math problems.

In this counting in tens learning exercise, 2nd graders practice counting on in tens in 6 rows of numbers. Students check their answers when done.

For this counting in tens worksheet, students fill in blanks in rows of numbers, counting in tens. A reference website for additional resources is given.

For this counting in tens worksheet, students count on in steps of 10 in 6 rows of numbers. Students fill in their answers in each box in each row.

in this addition worksheet, students read about carrying tens, then complete 13 problems, circling cubes as directed and solving. A website reference is given for additional activities. 

In this counting back worksheet, students count back in tens from beginning numbers in rows to arrive an the ending number, 4 rows total. An answer key is included.