➕ Addition up to 99

What your child will learn

• Students will be able to add two-digit numbers without carrying using bundles of tens and ones and the column method.
• Students will be able to add two-digit numbers with carrying by regrouping ten ones into one ten.
• Students will be able to solve one-step word problems involving addition of two-digit numbers up to 99.

Lessons in this unit

1. Adding without carrying: Add two-digit numbers where the sum of ones is less than 10. Use bundles of tens and ones and the column method.
2. Adding with carrying: Add two-digit numbers where the sum of ones is 10 or more. Regroup ten ones into one ten and carry it to the tens column.
3. Word problems: Solve one-step addition word problems from daily life, using the column method or bundles. Identify the operation as addition.

Key words

add

Put together to find the total.

sum

The answer when you add.

carry

When ten ones become one ten, we carry it to the tens place.

column method

Adding ones under ones and tens under tens.

total

The whole amount after adding.

regroup

Change ten ones into one ten.

Help your child at home

What to watch for

Adding tens first and then ones (e.g., 34+25 = 50+9 = 59) is okay, but they might forget to add the ones.

Help: Always add ones first, then tens. Use the column method.

Forgetting to add the carry to the tens (e.g., 28+35 = 53 instead of 63).

Help: Always add the carry after adding the tens. Practice with bundles.

Adding the tens and ones separately without regrouping when needed (e.g., 28+35 = 53).

Help: Use the column method and remember to carry.

Writing the sum of ones in the tens column (e.g., 34+25 = 79).

Help: Use graph paper or lined columns. Ones under ones, tens under tens.

Try this at home

• Bundles: show 34 as 3 tens 4 ones; add 4 + 5 = 9 ones, then 3 + 2 = 5 tens; 34 + 25 = 59
• Bundles: 28 + 35 (regroup 10 ones into 1 ten)
• Adding two quantities: 'Kabir has 23 marbles and gets 14 more.'
• Column method: 42 + 36 with ones under ones; 2 + 6 = 8, then 4 + 3 = 7; answer 78

Quick questions to ask aloud

1. What is 34 + 25? (59 / 49 / 79 / 14)
   Show answer

   Add ones: 4+5=9. Add tens: 3+2=5. So 34+25=59.
2. What is 28 + 35? (63 / 53 / 513 / 83)
   Show answer

   Add ones: 8+5=13. Write 3, carry 1. Add tens: 1+2+3=6. So 28+35=63.
3. Kabir has 23 marbles. His friend gives him 14 more. How many marbles does he have in all? (37 / 27 / 47 / 9)
   Show answer

   He gets more marbles, so we add. 23+14=37.

Parent guide: how to help your child with Class 2 Maths

Frequently asked questions

What will my child learn in "Addition up to 99" (Class 2 Maths)?

Your child will be able to: add two-digit numbers without carrying using bundles of tens and ones and the column method.; add two-digit numbers with carrying by regrouping ten ones into one ten.; solve one-step word problems involving addition of two-digit numbers up to 99..

How does MangoMindz teach "Addition up to 99"?

In 3 short parts (Adding without carrying, Adding with carrying, Word problems). Each part has a picture-based lesson read aloud by Mango Teacher, a quick check, and a quiz built from common mistakes children make, with Mango, a study buddy, for questions.

How long does "Addition up to 99" take?

About 120 minutes in total, spread over 3 parts of 15–25 minutes each.

How can I help my child with "Addition up to 99" at home?

Work through a small example together, such as: Bundles: show 34 as 3 tens 4 ones; add 4 + 5 = 9 ones, then 3 + 2 = 5 tens; 34 + 25 = 59; Bundles: 28 + 35 (regroup 10 ones into 1 ten). Then ask a quick question aloud: What is 34 + 25? (59 / 49 / 79 / 14)

What mistakes do children often make in "Addition up to 99"?

Adding tens first and then ones (e.g., 34+25 = 50+9 = 59) is okay, but they might forget to add the ones. Fix: Always add ones first, then tens. Use the column method. Forgetting to add the carry to the tens (e.g., 28+35 = 53 instead of 63). Fix: Always add the carry after adding the tens. Practice with bundles. Adding the tens and ones separately without regrouping when needed (e.g., 28+35 = 53). Fix: Use the column method and remember to carry.

Is "Addition up to 99" free on MangoMindz?

Yes. Every lesson part and quiz in "Addition up to 99" is free on MangoMindz, with no ads.