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It allows you to make an approximation for the final answer quickly. When the detailed answer has been calculated, if it is very different from the approximation then it is likely that a mistake has been made in either the approximation or the detailed calculation - you have no way of knowing which is wrong.
Note that there are circumstances where an approximation can be very different from the detailed calculation but both are correct. Division by a number close to zero can cause such problems.
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How does solving a simpler problem help you solve the original problem?
You gain relevant insights from solving that one problem, and then you can use those insights to help guide you to the solution of the original problem.
Do you estimate before the problem or after?
you must estimate before a problem then you can find out your real answer a compare
When both factors in a multiplication problem are rounded up to estimate the product te estimate is an?
overestimate
How does adding partial products help you solve a multiplication problem?
It can help you solve the problem more easily to get the exact answer.
Why is it important to check your solution in an applied problem using the original words of the problem?
Because you may have read the question wrong
