WHEN?
The Babylonians created the time's table over 4,000 years ago. Operations would be useful when you are doing math homework. You need to know how to subtract when you are doing division. Operations would also be useful when you are working at McDonald's, believe it or not.
At McDonald's when you give the person the cost of their food you, have to add the prices of the food. Robert Recorde introduced the modern use of the minus sign in 1557. Johannes Widmann introduced the first appearance of the minus sign in 1489. Addition was invented by the Chinese over 6,000 years ago.
Operations can be useful when you are playing a sport. You need to know what angle to kick the ball into the goal. You also have to use operations when you shoot the ball in the hoop in basketball. If you want to be a builder you have to use operations. People need to use math every day.
At McDonald's when you give the person the cost of their food you, have to add the prices of the food. Robert Recorde introduced the modern use of the minus sign in 1557. Johannes Widmann introduced the first appearance of the minus sign in 1489. Addition was invented by the Chinese over 6,000 years ago.
Operations can be useful when you are playing a sport. You need to know what angle to kick the ball into the goal. You also have to use operations when you shoot the ball in the hoop in basketball. If you want to be a builder you have to use operations. People need to use math every day.