hello, In this post we are going to discuss about the short method of the addition and subtraction
I think all of u know know the addition and subtraction. so we will discuss the short and tricky method to solve the addition and subtraction method.
example 1:
8991+9848+2857+8489= ?
Sol : solve following way to save time in the exam.
7591- 4868+2087- 3414= ?
Sol : solve following way to save time in the exam.
example 3: Decimal addition and subtraction .
3.891+14.34+12.5 = ?
Sol :
Step 1: First equal the length of number after decimal point by putting zero(0).
3.891+14.340+12.500 = ?
Step 2: Solve it as example1 and put decimal point in lineup.
example 4: When repeated the same digit
8+88+888+8888+88888 = ?
Sol :
Step 1: Take the repeated digit as common.
8(1+11+111+1111+11111) [Here is 8 ]
Step 2: Solve it as follows :-
= 8(12345) [After Addition]
= 98760 [ After multiplication]
Answer is : 98760
example 5: When repeated the same digit in decimal number.
0.8+0.88+0.888+0.8888+0.88888 = ?
Sol :
Step 1: Take the repeated digit as common.
8(0.1+0.11+0.111+0.1111+0.11111) [Here is 8 ]
Step 2: Solve it as follows :-
= 8(0.54321) [After Addition]
= 4.34568 [ After multiplication]
example 6:
8.8+8.88+8.888+8.8888+8.88888 = ?
Sol :
Step 1: First solve the Decimal Number.
See example 5
= 4.34568
Step 2: Addtion of the whole numbers.
8+8+8+8+8 = 8 × 5 = 40
Step 3: Now Add the whole number and Decimal number.
40 + 4.34568 = 44.34568
Answer is : 44.34568
Practice Questions :
0.8+0.88+0.888+0.8888+0.88888 = ?
Sol :
Step 1: Take the repeated digit as common.
8(0.1+0.11+0.111+0.1111+0.11111) [Here is 8 ]
Step 2: Solve it as follows :-
= 8(0.54321) [After Addition]
= 4.34568 [ After multiplication]
Answer is : 4.34568
example 6:
8.8+8.88+8.888+8.8888+8.88888 = ?
Sol :
Step 1: First solve the Decimal Number.
See example 5
= 4.34568
Step 2: Addtion of the whole numbers.
8+8+8+8+8 = 8 × 5 = 40
Step 3: Now Add the whole number and Decimal number.
40 + 4.34568 = 44.34568
Answer is : 44.34568
Practice Questions :
- 2672 + 792 + 3581 + 523 = ?
- 5832 – 976 + 352 - 1307 = ?
- 8.7327 + 5.21 + 7.321 + 2.5 = ?
- 7.842 – 3.52 + 2.5 - 4.05 = ?
- 6 + 66 + 666 + 6666 + 66666 = ?
- 0.4 + 0.44 + 0.444 + 0.4444 = ?
- 7.7 + 7.77 + 6.777 + 3.7777 = ?
- 5 + 555 + 55555 = ?
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