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SSSSS [86.1K]
3 years ago
13

Find each product by factoring the tens.

Mathematics
1 answer:
-Dominant- [34]3 years ago
3 0
<span>A technique for mental multiplication is called factoring the tens which relies on the fact that 10*n, for any real number n. This will make the problems easy to compute. 6 x 2 = 12 is a memory value. </span>

12  x 10  = 120

12   X 100  = 1200

Take for instance in 6 x 2, 6 x 20 and 6 x 200. Find the factors and these are the computations. We can also say: 

<span>6 x 20 = 6 x 2 x 10 = 12 x 10 = 120 
60 x 20 = 6 x 10 x 2 x 10 = 12 x 10 x 10 = 1200</span>

It must be remembered that in the commutative and associative properties of multiplication, the order of the factors does not matter when solving this kind of problem

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Step-by-step explanation:

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3 years ago
Translate and solve: 3x less than 2 times the sum of 2x and 1 is equal to the sum of 2 and 5. X=
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Answer:

3 x = 2 = 2 x = 1 = 2 = 5 X =

Step-by-step explanation:

Use the given functions to set up and simplify

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6 0
3 years ago
Someone help, this is kinda boring...
givi [52]

Answer:

Step-by-step explanation:

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8 0
2 years ago
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strojnjashka [21]
Use the metric relations,
AC*CD=BC^2
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7 0
3 years ago
Tema : Números reales 1. Juanita tenia en su casa 15/20 kg de arroz y un vecino le regalo 1/4 kg más para preparar arroz con lec
pantera1 [17]

Answer:

1) x = \frac{9}{20}\,kg, 2) Seis pares de zapatos (Six pairs of shoes), 3) x = \frac{33}{4}\,kg

Step-by-step explanation:

1) La cantidad de arroz no utilizada por Juanita es (The quantity of rice that was not used by Juanita is):

x = \frac{15}{20}\,kg + \frac{1}{4}\,kg - \frac{11}{20}\,kg

x = \frac{4}{20}\,kg + \frac{1}{4}\,kg

x = \frac{1}{5}\,kg + \frac{1}{4}\,kg

x = \frac{9}{20}\,kg

2) La cantidad de docenas sin vender es (The quantity of dozens of shoes that are not sold is):

x = 2 - \frac{2}{3}-\frac{3}{12} -\frac{4}{6}

x = 2 -\frac{2}{3} - \frac{1}{4}-\frac{2}{3}

x = 2 -\frac{4}{3}-\frac{1}{4}

x = 2 -\frac{16+3}{12}

x = 2-\frac{18}{12}

x = 2 - \frac{3}{2}

x = \frac{1}{2}

Hay seis pares de zapatos (There are six pairs of shoes).

3) El peso total de las frutas son (The total weight of fruits are):

x = 4\,kg + \frac{3}{4}\,kg + \frac{1}{2}\,kg +3\,kg

x = 7\,kg +\frac{6+4}{8}\,kg}

x = 7\,kg + \frac{10}{8}\,kg

x = 7\,kg + \frac{5}{4}\,kg

x = \frac{28+5}{4}\,kg

x = \frac{33}{4}\,kg

3 0
3 years ago
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