standard_description: Subtract multiples of 10 in the range 10-90 from multiples of 10 in the range 10-90 (positive or zero differences), using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.
problem_activity: Problem 1
What is the value of
$$1.4 \div 0.02$$
?
Problem 2
Estimate
$$4.92 \div 0.78$$
.


aligns: no