3 years ago

Which strategy can be used to multiply 6 x 198 mentally?

2 answers:

6 0

use estimation(i think). round 198 to 200 and multiply that by 6 in your head. 2*6=12 then add the two zeros for tens and ones place. 12+0+0= 1200

hope this helped!

faust18 [17]3 years ago

5 0

if you know the tables then you can do that easily.

You might be interested in

in the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog

DENIUS [597]

(13/20)=(x/152)

1976=20x

x=98.8

About 99 have dogs

4 0

4 years ago

15 + 4x = 12 + x nm jjk kj k j jk kj k kj kjkj

Marta_Voda [28]

Answer:

x = −1

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

X=−12, y=−1/6 The equation is y= . When x=3, y= .

Vera_Pavlovna [14]

Answer:

y=-12,y=-1/6

Step-by-step explanation:

there

3 0

3 years ago

Bamboo plants grow rapidly. A bamboo plant is 130 inches tall. Tomorrow it will be 143 inches tall, the next day it will be 156

tensa zangetsu [6.8K]

An arithmetic sequence has a common difference.
143 - 130 = 13
156 - 143 = 13
169 - 156 = 13
The common difference is 13.

a1 = 130
a2 = 130 + 13
a3 = 130 + 2 * 13
a4 = 130 + 3 * 13
...
an = 130 + (n - 1) * 13

an = 130 + 13(n - 1)

an = 130 + 13n - 13

an = 117 + 13n

an = 13n + 117

4 0

3 years ago

Given that the points (-1, 5) and (2, 1) are vertices of a rectangle with sides parallel to the axes, how much longer is the len

Norma-Jean [14]

Answer:

Correct choice is A

Step-by-step explanation:

Two vertices of the rectangle have coordinates A(-1, 5) and B(2, 1). If rectangle sides are parallel to the axes, then two remaining vertices have coordinates C(-1,1) and D(2,5) (see attached diagram for details).

Find the length and the width:

$AC=\sqrt{(-1-(-1))^2+(5-1)^2}=4\ units,\\ \\AD=\sqrt{(2-(-1))^2+(5-5)^2}=3\ units.$

Then the length is 1 unit longer than the width.

7 0

3 years ago