By rounding 1 significant figure estimate the answers to these questions a)59 ÷25 b)682/71 c)91x18/58
Answers
Answer: (to the first significant number)
92 x 98 =9000
49 x 138 =5000
216 x 876 = 180000
:D
Step-by-step explanation:
92 x 98 = . . .
so first you round both numbers so 92 turns to 90 and 98 turns to 100
so now we have 90 and 100. Now we have to times the first numbers so that will be 9 x 1=9 and now we have to add all the zeros so there's one zero next to 90 and two zeros next to 100 so altogether there are three zeros so the answer is 9000
For the other calculation, you have to do the same thing but just with bigger numbers
The given question we have to estimate the following by rounding to 1 significant figure
a)59 ÷25
b)682/71
c)91x18/58
To round to a significant figure:
look at the first non zero digit if rounding to one significant figure.
draw a vertical line after the place value digit that is required.
In maths significant figure of a number is the first digit which is not zero.
a) 59÷25
=2.36
It is rounded to 2.
b) 682÷71
9.60
It is rounded to 10 because of 6 which is greater than 5
c) 91*(18/58)
28.241379
It is rounded to 28.
# spj2
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