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Zina [86]
3 years ago
5

Explain when to use Mental Math

Mathematics
1 answer:
I am Lyosha [343]3 years ago
3 0
It is best to use mental math with some equations (5x5 or something that is easy enough that work does not have to be shown 10 dived by 5
You might be interested in
Every day after school, Kelly and Bella walk their dogs around the block. The block is 274 meters long and 80 meters wide. What
trapecia [35]

Answer:

708meters

Step-by-step explanation:

Given data

Lenght = 274meters

Width= 80 meters

The expression for the perimeter is

P= 2L+2W

substitute

P= 2*274+ 2*80

P= 548+160

P= 708 meters

Hence the perimeter of the block is 708meters

4 0
3 years ago
There is a spinner with 15 equal areas, numbered 1 through 15. If the spinner is spun
Brrunno [24]

Answer:

1/3 and 1.5

Step-by-step explanation:

1,2,3,4,5,6,7,8,9,10,11,12,13,14,15

There are 5 Multiples of 3 on the Spinner and 3 multiples of four.

5/15 is the probability for a multiple of 3 which can be simplified to 1/3

3/15 is the probability for a multiple of 4 which can be simplified to 1/5

Hope this Helps!

5 0
4 years ago
(I don't get this at all cause it said it was wrong when I answered)
Umnica [9.8K]

Answer:

hhahahahahahahha me is brilliant and know da answer therefore it is on the 47 day >:D

Step-by-step explanation:

the 48 day it willl double meaning and it is also the day all the lilypads cover the lake so that means on day 47 they lake is half fulll

HAHA



3 0
4 years ago
Read 2 more answers
Which of the following expressions represents the distance betweenn -3/4 and -0.2 on a number line I WILL MARK BRAINLIEST
Marysya12 [62]

Answer:

b

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
PLEASE HELP ME I NEED TO DO THIS TGA
tigry1 [53]

Step-by-step explanation:

a) -2 - (-9) = 7

→ -2 + 9 = 7

as, when the bracket will be open ( - ) (-) = + so 9 will be positive and as 2 is negative they will get subtracted and as 9 is greater no. and have a positive sign so, the answer will be positive as well.

b) -2-9 = -11

as the both numbers are negative so they will get added so we got 11 and also they bith share negative sign so in addition or subtraction the result will have the same sign as the numbers which are added have.

c) -2 - (-9) - (-2) = 9

→ -2 + 9 + 2

→ -2 + 11 = 9

when both the bracket will get open so the negative sign will change with positive so 2 and 9 have a positive sign and as they have similar sign when they will get add up than they will have same sign so we will get 9+2=11, a positive 11 and as 2 is negative so they will be subtracted and 11 is greater so we will have a positive 9.

<em><u>hope </u></em><em><u>this</u></em><em><u> answer</u></em><em><u> helps</u></em><em><u> you</u></em><em><u> dear</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>and </u></em><em><u>may </u></em><em><u>u </u></em><em><u>have</u></em><em><u> a</u></em><em><u> great</u></em><em><u> day</u></em><em><u> ahead</u></em><em><u>!</u></em>

6 0
3 years ago
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