Question

simplify 640➗80✖️4➖4 of 20➕639➖72➗9

Answer 1

Hi ,
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For simplifying an expression

containing various types of fractions ,

the order of various operations

involved should be strictly

maintained.

A single technique for arranging the

expression in the proper sequence,

is by placing them in the order of the

first letter appearing in VBODMAS

where the letter stands for ,

V - vinculum (- ) bar

B - bracet and operation of brackets

in the order ( ) , { } and then [ ]

O - of

M - multiplication. ( x )

A - addition ( + )

S - subtraction ( - )
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According to the problem ,

640 ÷ 80 × 4 - 4 of 20 + 639 - 72 ÷ 9

= 8 × 4 - 4 × 20 + 639 - 8

[ since i) 640/80= 8 , ii) 72/ 9 = 8 ]

= 32 - 80 + 639 - 8

= 671 - 80 - 8

= 671 - 88

= 583

I hope this helps you.

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