3 years ago

Explain how to find 40x50 using mental math

Mathematics

2 answers:

miv72 [106K]3 years ago

6 0

First, do 4*5=20

Then, add two zeros...

So the answer is 2000

Rudik [331]3 years ago

3 0

Bscically DO 4x5 which is 20
NEXT add the two zeros
NOW you have 2,000
40x50=2,000

You might be interested in

4-(11/3)/4-(2/3) how do i solve this

kirill [66]

Answer: 0.1 or $\frac{1}{10}$

Step-by-step explanation:

$\frac{4-\frac{11}{3} }{4-\frac{2}{3} }$

= $\frac{1}{10}$

6 0

4 years ago

Highschool math. this one is pretty easy.

Zigmanuir [339]

A bisector splits an angle into two equal angles.

The answer is the last one: it splits the angle into two congruent angles.

5 0

3 years ago

Identify a3 of a sequence: 0.25, 0.5, 0.75, 1, 1.25, 1.5,.... a3=

wariber [46]

Answer:

0.75

Step-by-step explanation:

The given sequence is an AP , as the difference of all the terms is same

$a_3 = 0.75$

8 0

4 years ago

If 75% of a number is 15, 15% of that number

natta225 [31]

Answer:

Step-by-step explanation:

0.75 x ? = 15

? = 15/0.75 = 20

15% of 20 = 3

5 0

2 years ago

Write an equation of a line that is parallel to y=-3x+5 that passes through the point (0,-4)

elena55 [62]

Answer:

${ \rm{y = - 3x + 5}}$

Gradient = -3

• Parallel lines have the same gradient, therefore gradient, m is -3

${ \rm{y = mx + c}}$

• At point (0, -4)

${ \rm{ - 4 = ( - 3 \times 0) + c}} \\ \\ { \rm{c = - 4}}$

y intercept is -4

${ \boxed{ \boxed{ \mathfrak{answer : }}{ \rm{\: \: y = - 3x - 4}}}}$

6 0

3 years ago