Click the drop down links in the header above for specific lessons.
B.E.S.T. Standards
MA. 4.NSP.2.3 - Multiply two whole numbers, each up to two digits, including using a standard algorithm with procedural fluency.
MA.4.NSO.2.5 - Explore the multiplication and division of multi-digit whole numbers using estimation, rounding, and place value.
MA.4.NSO.2.2 - Multiply two whole numbers, up to three digits by up to two digits, with procedural reliability.
array - a way of displaying objects in rows and columns
compatible numbers - numbers that are easy to compute mentally
estimate - to give an approximate value rather than an exact answer (Usually for us it means round the numbers in the problem and then multiply them)
factors - the numbers that are multiplied together to give a product
partial products - Products found by breaking one factor in a multiplication problem into ones, tens, hundreds, and so on and then multiplying each of these by the other factor
product - the answer to a multiplication problem
rounding - a process that determines which multiple of 10, 100, 1000 and so on a number is closest to (Example: if you were rounding 37 to the nearest tens' place, you'd think is 37 closer to 30 or 40?)
variable - a symbol or a letter that stands for a number