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3 years ago

Explain how to find 40×50 using mental math

Mathematics

2 answers:

lara [203]3 years ago

5 0

Just do 4x5 then add the zeros

umka21 [38]3 years ago

3 0

Think about 40 over 50 and a line separating the answer from the problem like this:

40
x 50
---------
200 0*0=0 5*4= 20 so just put the zero back on the answer and you get 200.

the answer goes under the dotted line

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Mr. Hans wants to give an award to the student with the best jump rope rate. Linda can jump rope 120

Gelneren [198K]

Answer:

c) Mike receives the award for being the best at jumping rope.

Step-by-step explanation:

Here, according to the question

Jumping rate of Linda = 120 times in 4 minute

So, number of jumps Linda does per minute = (120/4) = 30

So, Jumps per minute of Linda is 30.

Jumping rate of Carl = 315 times in 9 minute

So, number of jumps Carl does per minute = (315/9) = 35

So, Jumps per minute of Carl is 35.

Jumping rate of Mike = 252 times in 7 minute

So, number of jumps Mike does per minute = (252/7) = 36

So, Jumps per minute of Linda is 36.

Now if we compare the jumps per minute of Linda , Carl and Mike, weget that Mike has the best rate of 36 jumps per minute.

Hence, Mike receives the award for being the best at jumping rope.

4 0

3 years ago

Whats the answer pls thankyou

Sladkaya [172]

Answer:

your answer is 0.4x10^6

5 0

2 years ago

Read 2 more answers

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Phantasy [73]

Answer:

3 bags

Step-by-step explanation:

4/3 x 9/2 = 36/6

36/6 = 6 square yards

so you will nee 3 bags of soil.

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2 years ago

If the first step of solving a system of equations by subsistution is to solve one equations for one of the variables, how do ch

Nezavi [6.7K]

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2 years ago

Describe the rule for the rotation.

finlep [7]

Answer:

Step-by-step explanation:

If you draw a line from the origin (0,0) to L ( the original point ) and a different line from the origin to the image L' you can see the angle of rotation as being

90 degrees and that the rotation is clockwise.

the rule is (x, y) become ( y, -x)

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3 years ago