Mental Maths SUBTRACTION Techniques and Tricks

Hi, welcome to nrrbeassistance.blogspot.com. Mental Maths SUBTRACTION Tricks and Shortcuts for the jobs, bank exams like RBI / SBI / IBPS CWE / RRB, etc. Useful in the preparation of quantitative aptitude &/ numerical ability for the pupil preparing probationary officers (PO) / specialist officer (SO) / manager / assistants / clerks posts and others.

Mental Maths SUBTRACTION Techniques, Tricks and Shortcuts

Techniques:

• Learn to calculate from left to right: 1427 – 698 = (800 – 100) + (30 – 10) + 9 = 729
• Think in terms of what number added to the smaller equals the larger: 785 – 342 = 443 (left to right)
• Add a number to the larger to round to next highest 0; then add same number to the smaller and subtract: 496 – 279 = (496 + 4) – (279 + 4) = 500 – 283 = 217 (left to right)
• Add a number to the smaller to round to the next highest 10, 100, 1000 and etc.; then subtract and add the same number to the result to get the answer: 721 – 587 = 721 – (587 + 13) = (721 – 600) + 13 = 134
• Subtract a number from each number and then subtract: 829 – 534 = 795 – 500 = 295

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