This guide supports the Vacation with My Nani Maa Class 3 maths worksheet on this page. It covers Class 3 Maths Chapter 4 from the NCERT Maths Mela book, which is part of the latest NCERT syllabus for CBSE schools. Topics include addition and subtraction up to 100 and beyond, making 9, 10 and 20, tens frames, jumps on the number line, the number grid, box diagrams, estimating answers, word problems, magic sums and magic squares. Use it with the printable Vacation with My Nani Maa worksheets for Class 3, the Vacation with My Nani Maa Class 3 quiz and the 15 Vacation with My Nani Maa Class 3 activities above.

Introduction to NCERT Class 3 Maths Chapter 4 Vacation with My Nani Maa

Book: Maths Mela, the NCERT Mathematics textbook for Class 3 (Grade 3). Chapter: 4, Vacation with My Nani Maa. Board: CBSE and other schools that follow NCERT. This is a chapter on addition and subtraction. A visit to a grandmother gives many everyday places to add, take away and compare, such as sweets, books, stamps, radishes, vegetables and apples. The chapter shows children several ways to solve the same problem, so they can pick the way that suits them.

What is there in the chapter?

• A hidden number trick: say the number that is hidden when you know the total and the part you can see
• Number pairs that make 9, 10 and 20
• Adding and taking away with dots and tens frames, such as 6 + 8, 5 + 10, 9 − 6 and 18 − 9
• A card game in which three cards make an addition or subtraction statement
• Adding and subtracting on a bead string (ginladi) and on a number line, with different jumps for the same sum
• Jumps of 10 forward and backward and skip counting tables for jumps of 5, 6 and 9
• The number grid game with two dice and moving forward or backward
• Magic sums puzzles and a magic square with the numbers 1 to 9
• Box diagrams to show word problems and bundles of sticks to add 25 + 36
• Making 100, adding 85 + 67 and finding how many more
• Estimating to say if an answer is more or less than 100
• Word problems with box diagrams and a game of reaching 100

NCERT Class 3 learning objectives for this chapter

These objectives are written from the content of the chapter. They are not copied from the book.

• To add and subtract two-digit numbers using more than one way
• To find the missing part when the total and one part are known
• To use tens frames, number lines, number grids and bundles of sticks to show addition and subtraction
• To jump by 10 and by other numbers, forward and backward
• To draw a box diagram and use it to solve a word problem
• To estimate an answer and say if it is more or less than 100
• To use words such as total, sum, more, difference, less and take away for addition and subtraction
• To notice patterns in puzzles such as magic sums

Learning outcomes

After this chapter and the practice on this page a Class 3 child should be able to:

• say the number that makes a total of 9, 10 or 20 with a given number
• add and subtract two-digit numbers on a number line by jumping the tens first and then the ones
• move on a number grid by adding or subtracting two-digit numbers
• solve word problems on addition, subtraction and how many more using a box diagram
• make an estimate and check it with the exact answer
• explain the answer in more than one way
• complete a magic sums puzzle and a magic square using row and column totals
• make up a word problem with two numbers

Vacation with My Nani Maa Class 3 resources on this page

• Vacation with My Nani Maa Class 3 worksheet: a printable NCERT style worksheet on addition and subtraction, number lines, box diagrams and estimating.
• Vacation with My Nani Maa Class 3 quiz: a free 20-question online quiz with easy, average and thinking questions, picture questions and instant marks with a reason for every answer.
• Vacation with My Nani Maa Class 3 activities: 15 free online activities, made of 5 games, 5 workshops and 5 challenges, with marks and a comment after the challenges.
• Practice sheet: 16 questions you can type and check, with a Show answers button.

What is Class 3 Maths Chapter 4 Vacation with My Nani Maa?

Chapter 4 of the NCERT Class 3 Maths book Maths Mela is called Vacation with My Nani Maa. It builds the skill of adding and subtracting two-digit numbers. The chapter does not push one method. It shows tens frames, bead strings, number lines, number grids, bundles and box diagrams side by side so that children see how each picture shows the same sum.

Hidden numbers and making 9, 10 and 20

The chapter opens with a trick in which some seeds are hidden under a cloth and the total is known. The hidden number is the total take away the seeds on the table. For a total of 15 and 12 seeds on the table, 3 are hidden. The teacher’s note asks children to quickly say the number that makes 9 when a number from 1 to 9 is called, and then to do the same with 10 and 20. Knowing these pairs makes later sums faster.

Tens frames

A tens frame holds 10 dots in two rows of 5. To add 6 + 8, fill a frame with 6 dots and move 4 dots from the 8 to complete 10. That leaves 4 more, so the sum is 14. For 5 + 10, a full frame and 5 more dots make 15. For subtraction, take dots away from a frame, such as 9 − 6 = 3 or 18 − 9 = 9.

Adding on the number line and the bead string

The chapter shows 15 stamps and 7 more. One way is to jump 1 seven times. Another is +5 to reach 20 and +2 to reach 22. A third is +10 to reach 25 and then −3 back to 22. All three give 15 + 7 = 22. Adding 30 more stamps to 22 stamps gives 52. Subtraction can be done by jumping back, or by counting up from the smaller number. To find 52 − 37, start at 37, jump 3 to reach 40, jump 10 to reach 50 and jump 2 to reach 52. The jumps are 3 + 10 + 2 = 15.

Number grid and jumps of 10

On the number grid from 1 to 100, adding 10 moves a counter one row and the ones digit stays the same. The frog and grasshopper activities use jumps of 10 forward and backward. Children also fill tables for jumps of 5, 6 and 9 and play the grid game with two dice. They make a two-digit number from the two dice and move forward or backward by that number. If they cannot go forward they move backward.

Magic sums and the magic square

In a magic sums puzzle, the numbers 1 to 9 are placed in a 3 by 3 grid. The numbers in each row add up to the number on the right and the numbers in each column add up to the number below. Children find what is common when they add the totals in two groups of boxes. In the magic square 2 7 6, 9 5 1 and 4 3 8, every row, column and diagonal adds up to 15. Children fill the blanks of a similar square. These puzzles build number sense and make adding fun.

Box diagrams and word problems

A box diagram shows a story as boxes. The total is one long box on top, and the parts are two boxes below. 25 red radishes and 36 white radishes make 25 + 36 = 61 radishes. When the total is 100 and one part is 65, the other part is 100 − 65 = 35. To find how many more, children compare two bars. 85 apples and 67 apples make 152 apples in all, and the difference is 85 − 67 = 18 apples.

Estimating more or less than 100

Children estimate first and then solve. They match sums such as 134 − 56, 20 + 41, 150 − 49 and 199 − 90 with the words more than 100 and less than 100. A round number makes this easy. 150 − 50 is 100, so 150 − 49 is a little more than 100. The same answer should then be worked out on a number line, so that the estimate and the exact answer can be compared.

Words for adding and subtracting

The teacher’s note asks teachers to introduce many words. Addition can be spoken as more, added to, total or sum. Subtraction can be spoken as take away, difference, less or reduce. A child who knows these words can read a word problem and pick the right operation.

Types of questions to practise

Questions on this chapter ask children to find a hidden number, make 10 and 20, add and subtract on a tens frame or number line, move on a number grid, complete a magic square, draw a box diagram, solve word problems, estimate if an answer is more or less than 100 and make a word problem of their own. The online quiz on this page mixes choice questions, true or false questions, picture questions and typed answers, and the practice sheet has 16 typed answers.

Solved examples

Common mistakes

Addition and subtraction in daily life

We use these skills when we add the prices of two things at a shop, count how many more pages are left in a book, check how many are still missing from a set of 100 cards or count scores in a game. Ask your child to add the numbers on two bus tickets or to say how many stamps, stickers or coins are in two piles together.

What your child learns from the Vacation with My Nani Maa worksheet

• Finding hidden numbers and making 9, 10 and 20
• Adding and subtracting with tens frames
• Jumping on a number line and a number grid
• Skip counting in jumps of 5, 6, 9 and 10
• Drawing box diagrams for word problems
• Estimating more or less than 100
• Words for addition and subtraction
• Magic sums and magic squares

Tips for parents and teachers

Use real things such as seeds, coins or buttons and a cloth to play the hidden number trick. Draw a number line on paper and let your child jump with a pencil. Ask them to solve the same sum in two ways and explain which is easier. Let them make their own word problems and share them with a friend. Praise careful thinking more than speed.