Curated OER
Waste Audit
Learners engage in a lesson plan that is concerned with the concept of mental math. They perform calculations as following: recognizing a half, three quarters, and tenths. Students are also challenged to extend skills to making...
Curated OER
Smart Doubling
Second graders use mental math in calculations involving addition and subtraction. They study doubles facts to work out addition problems mentally using part and or whole reasoning.
Curated OER
The Part-adder 1
Second graders investigate the addition of whole numbers. They mentally perform calculations involving addition and subtraction. They make sensible estimates and check the reasonableness of answers.
Curated OER
Mental Multiplication
Pupils discover how to multiply large numbers in their heads using some simple techniques. They understand that multiplying by 5 is done by multiplying by 10 and cutting the answer in half. They also understand that multiplying by 9 is...