Mathematical problems can be solved in multiple ways. Even the toughest math problem can be solved with this simplified step-by-step approach. Here are the six tips for solving Math Problems Without a Calculator.

1. BY EVERYDAYTUITION
6 TIPS FOR SOLVING
MATH PROBLEMS
WITHOUT A
CALCULATOR

2. ADDITION + SUBTRACTION
1. Addition
The first tip is to deconstruct your problem into
smaller components in order to make it simpler.
For instance, we could rewrite
Switch
When addition, it's frequently simpler to choose a
smaller number, so exchange 131 and 858.
858 + 131
= 858 + 100 + 30 + 1
= 989
567 + 432
= 567 + (400 + 30 + 2)
= 967 + 30 + 2
= 997 + 2
= 999

3. 2. Subtraction
It may be simpler to perform subtraction if you use
a number's complement. The difference between
the original number and a round number, like 100 or
1000, is the complement.
For Example:-
721–387
# the complement of 87 is 13, so we can swap 387
with 400 – 13
-> 721 — (400 - 13)
= 321 - -13
= 321 + 13
= 334
3. Multiplication
Elevens
For a two-digit number, add the digits and put the answer
in the middle of the number you are multiplying:

4. For Example
35 x 11
-> 3_5
-> 3+5 = 8
-> 385
4. Nines
Multiplying by nine can be simplified by multiplying
by 10 and removing the starting number. Fpr
Example -
799 x 9
= 799 x (10 -1)
= 7990 – 799
= 7191

5. 5. How to solve squares
Use this formula to rewrite a square equation into numbers
that are easier to handle
n^2 = (n+d)(n-d) + d^2
where n is the number to be squared, and d is the difference
Here’s an example
57^2
= (57+3)(57–3) + 3^2
# we add 3 to 57, as 60 is easier to multiply than 57, and
subtract 3 from the second 57
-> 60 x 54 + 9
= 3000 + 240 + 9
= 3249
6. Reverse the question
Since percentages are associative, reversing the
question order can simplify the calculation.
What’s 36% of 25
-> is the same as 25% of 36
-> 25% is ¼
-> 36/4 = 9
36% of 25 is 9

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