## Math Story : Introduction to subtraction

#### Fun With Ms Subtract

One day, Cirha was playing in the garden. Suddenly, she spots a bright and shining object in the bushes.

Cirha is curious. She runs near the bushes to find out what it is. â€śWow! It looks like a gadgetâ€ť, she says.

As she grabs the mysterious object, it vanishes in the air and says, â€śI am Ms Subtract – a Math gadget. I make things disappear by
taking them away. Remember, to make anything disappear, you need to tell me the correct answer of how many will remain in the endâ€ť, and it settles back in Cirhaâ€™s hand.

Cirha always wanted to make things disappear without touching them. â€śNow that I have Ms Subtract, I can fulfil my wishâ€ť, she claims. She is delighted and decides to try the gadget on some stones.

She rolls the gadget in the air and says, â€śMs Subtract! Take away 6 stones from the group of 10, only 1 stone remains. Go!â€ť

But nothing happens! She counts the stones to cross-check whether the gadget worked or not. But they are still the same
10 stones.

Cirha does not give up. She tries again, â€śMs Subtract! Take away 6 stones from the bunch of 10, only 2 stones remain. Go!â€ť
None of the stones disappears. She is disappointed.

Uncle Math is stressed. He is searching for something. Suddenly, he spots Cirha and screams â€śMy gadget! My gadget! I have been
looking for it since morning. Where did you find it?â€ť She quickly narrates the morning scene and her struggles with the gadget.

Uncle Math decides to help. â€śMs Subtract is not working because your answer is wrong Cirhaâ€ť, he says. â€śHere are your 10 stones. If
I take away 6, how many remain?â€ť he questions. â€ś4â€ť answers Cirha.

â€śCorrect! This method of taking away one or more things is called Subtraction. We show subtraction using the â€ś-â€ť minus
symbol. So, we say 10 stones minus 6 stones is equal to 4 stonesâ€ť, explains Uncle Math.

â€śOhh! Now I get itâ€ť, says Cirha. She understands subtraction and is ready to use the gadget. This time she tries it on some
empty pots. â€śMs Subtract! Take away 4 pots out of 7, only 3 remain. Go!â€ť The pots disappear. Cirha jumps out of joy.

â€śWell done Cirha! Let us make people disappear nowâ€ť, suggests Uncle Math. â€śNo! People might get hurt. How can I hurt anyone?â€ť
she says. â€śI do not get you. If your gadget works, then everybody will like you. You will be famous. How is this hurting anyone?â€ť he
questions.

â€śDefinitely. But if I try this gadget on innocent people for fun, then it would be selfishâ€ť, she answers. Uncle Math proudly
says, â€śI wanted to test you to see if you would misuse any of your superpowers, and I got my answerâ€ť. Cirha smiles and
continues her experiments.

When the gadget became Cirhaâ€™s superpower, she decided to use it only for learning without hurting anyone. With great
power comes great responsibility. Indeed beautiful gesture, beautiful subtraction and beautiful Cirha.

## We Learnt Thatâ€¦

• The method of taking away one or more things is called Subtraction.
• Subtraction is denoted using the â€ś â€ś Minus symbol.
• We should never misuse our powers.
• We should not be selfish, but empathetic towards others.
• With great power comes great responsibility.

## Letâ€™s Discuss

• What was the name of the gadget?
• How did Uncle Math help Cirha in using the gadget?
• Cirha did not try the gadget on people. Does this make her good or bad? Why? Explain.
• Ms Subtract became Cirhaâ€™s superpower. What type of superpower would you wish for? Why?