Do it: Practice

Complete each operation by creating a question and using one strategy to solve it$.$ Provide a detailed explanation of how the strategy works.

EXAMPLE

Grade Question

$273-49$

Strategy:

Rounding and Compensation

Steps for strategy

$1.$ Identify your starting point $(73)$

$2.$ Round off the second number to the nearest $10(49$ becomes $50)$

$3.$ Subtract the new numbers you have $(73-50-=23$

$4.$ Rounding off made your answer $1$ too many so you will add the $1$ you borrowed back to the answer to get the final answer $(23+1=24).$

ADDITION

Grade Question

Strategy Steps for strategy

SUBTRACTION

Grade Question

Strategy Steps for strategy

MULTIPLICATION

Grade Question

Strategy Steps for strategy

DIVISION

Grade Question

Strategy Steps for strategy