An electronic calculator is a small, portable electronic device used to perform both arithmetic operations and complex mathematical operations.

The first solid electronic calculator was created in the 1960 s, building on the extensive history of tools such as the abacus (developed around 2000 BC), and the mechanical calculator (developed in the 17^th century AD). It was developed in parallel with the analog computers of the day.

In addition to general purpose of calculators, there are those designed for specific markets, for example, there are scientific calculators which include trigonometric and statistical calculations. Some calculators even have the ability to do computer algebra. Graphing calculators can be used to graph functions defined on the real line, or higher dimensional Euclidean space.

When does the mechanical calculator developed?

An electronic calculator is a small, portable electronic device used to perform both arithmetic operations and complex mathematical operations.

The first solid electronic calculator was created in the 1960 s, building on the extensive history of tools such as the abacus (developed around 2000 BC), and the mechanical calculator (developed in the 17^th century AD). It was developed in parallel with the analog computers of the day.

In addition to general purpose of calculators, there are those designed for specific markets, for example, there are scientific calculators which include trigonometric and statistical calculations. Some calculators even have the ability to do computer algebra. Graphing calculators can be used to graph functions defined on the real line, or higher dimensional Euclidean space.

What is the synonym of extensive?

A laptop is a kind of computer unit which has the same function as a PC (Personal Computer), but it’s smaller, lighter and of different sizes. Nowadays, most people choose laptops for several reasons.

A laptop is a portable device. This portability is very helpful for our work, study and other activities. We do not need complicated cable installations to activate a laptop. With a laptop, we can do our work anytime and anywhere.

Moreover, a laptop allows us to access the internet in public places which provide free access called hot spot areas. Some people like to use this facility to carry out their tasks.

Finally, a laptop consumes energy more efficiently than a PC does. This device uses a rechargeable battery as a source of electric energy. So, if we prefer using a laptop, it means that we support the government program to save energy. That’s why a laptop has become very popular recently.

What is the purpose of the text above?

A laptop is a kind of computer unit which has the same function as a PC (Personal Computer), but it’s smaller, lighter and of different sizes. Nowadays, most people choose laptops for several reasons.

A laptop is a portable device. This portability is very helpful for our work, study and other activities. We do not need complicated cable installations to activate a laptop. With a laptop, we can do our work anytime and anywhere.

Moreover, a laptop allows us to access the internet in public places which provide free access called hot spot areas. Some people like to use this facility to carry out their tasks.

Finally, a laptop consumes energy more efficiently than a PC does. This device uses a rechargeable battery as a source of electric energy. So, if we prefer using a laptop, it means that we support the government program to save energy. That’s why a laptop has become very popular recently.

A public place where we can have free access to the internet is . . . .

A laptop is a kind of computer unit which has the same function as a PC (Personal Computer), but it’s smaller, lighter and of different sizes. Nowadays, most people choose laptops for several reasons.

A laptop is a portable device. This portability is very helpful for our work, study and other activities. We do not need complicated cable installations to activate a laptop. With a laptop, we can do our work anytime and anywhere.

Moreover, a laptop allows us to access the internet in public places which provide free access called hot spot areas. Some people like to use this facility to carry out their tasks.

Finally, a laptop consumes energy more efficiently than a PC does. This device uses a rechargeable battery as a source of electric energy. So, if we prefer using a laptop, it means that we support the government program to save energy. That’s why a laptop has become very popular recently.

A laptop has very popular because . . . .

Snakes are reptiles or cold-blooded creatures. They belong to the same group as lizards (the scaled group, Squamata) but from a subgroup of their own (Serpentes).

Actually snakes have two legs but a long time ago they had claws to help them slither along. Snakes are not slimy. Snakes are covered in scales which are just bumps on skin.

Their skin is tough however it’s shiny and it’s used to make them reduce friction as the snake slithers on the ground.Snakes usually sun bathe on rocks within the heat weather. This is because snakes are cold-blooded; they have to sunbathe because they need sun’s heat to heat their bodies up.

Most snakes live in the country. Some varieties of snakes sleep in trees, some sleep in water, however most survive in the bottom in deserted rabbit holes, in thick, long grass and in recent logs.

A snake’s food sometimes consists of frogs, lizards, and mice and different snakes. The Eunectes murinus will eat little crocodiles and even bears. several snakes defend themselves with their fangs. Some snakes are protected by scaring their enemies away just like the elapid snake. The flying snakes glide far away from danger. Their ribs unfold apart and also the skin stretches out. Its technique is simply just like the sugar gliders

Snakes are cold blooded, that’s why they need . . . .

Snakes are reptiles or cold-blooded creatures. They belong to the same group as lizards (the scaled group, Squamata) but from a subgroup of their own (Serpentes).

Actually snakes have two legs but a long time ago they had claws to help them slither along. Snakes are not slimy. Snakes are covered in scales which are just bumps on skin.

Their skin is tough however it’s shiny and it’s used to make them reduce friction as the snake slithers on the ground.Snakes usually sun bathe on rocks within the heat weather. This is because snakes are cold-blooded; they have to sunbathe because they need sun’s heat to heat their bodies up.

Most snakes live in the country. Some varieties of snakes sleep in trees, some sleep in water, however most survive in the bottom in deserted rabbit holes, in thick, long grass and in recent logs.

A snake’s food sometimes consists of frogs, lizards, and mice and different snakes. The Eunectes murinus will eat little crocodiles and even bears. several snakes defend themselves with their fangs. Some snakes are protected by scaring their enemies away just like the elapid snake. The flying snakes glide far away from danger. Their ribs unfold apart and also the skin stretches out. Its technique is simply just like the sugar gliders

What you know from text about snake fact

Tsunami is a japanese word from a seismic sea wave generated by an undersea earthquake, landslide, or eruption. Most tsunami happen along the ring of fire. It is a zone of volcanoes and seismic activity. The zone encircles the pacific ocean.

Historically, tsunami has caused much destruction and death. Sibce 1819, about 40 tsunami have struct the hawaiian islands and since 1883, about 20 tsunamis have struck indonesia. The last one was on december 26, 2004, which caused over 100,000 deaths.

A tsunami can have a width of 100 to 200 km and may spread far across the deep ocean. The speed is as fast as a jet plane. When the wave reaches land it can be very high, about 15 m or more.

In Which Paragraph did you find the information about the cause of tsunami?

Platypus is a semi aquatic mammal from East to North Australia including Tazmania. Platypus is one of species of mono dream and the five extreme species. Platypus is also the one and only mammal that lays eggs instead of giving birth. They lay eggs instead of giving birth because it can make them live young. Platypus have a flat body and tail and are all covered with dense brown fur to keep them warm. They have webbed feet and large robbery nets. They use their tail for story joy. Platypus are species that are close to ducks and they are mammals. Their weights are varieties around 0.7 to 2.4 kg and males are larger than females. Male total length averages to 50 cm while the female major approximately 45 cm. Platypus has an average temperature of 32 degrees Celsius and typical of the placental mammals.

How long is the male platypus?