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Subtraction using Place value and Standard Algorithm (view source)
Revision as of 11:50, 14 October 2022
, 11:50, 14 October 2022no edit summary
=== '''Materials:''' ===
=== '''Materials:''' ===
geogebra file: <nowiki>https://www.geogebra.org/classic/uENt3Tj8</nowiki> , <nowiki>https://www.geogebra.org/m/uuk3mjne</nowiki>, black board,
geogebra file: <nowiki>https://www.geogebra.org/classic/uENt3Tj8</nowiki> , <nowiki>https://www.geogebra.org/m/uuk3mjne</nowiki>, black board,
'''<nowiki>https://www.geogebra.org/m/av6psbf7#material/xt3yPtRg</nowiki>'''
'''<nowiki>https://www.geogebra.org/classic/ZBnCfzbA</nowiki>'''
=== '''SUBTRACTION WITH OUT CARRY''' ===
=== '''SUBTRACTION WITH OUT CARRY''' ===
==== '''Subtraction of the numbers lesser than 10.''' ====
'''Procedure :'''
'''Procedure :'''
For example: 9-5=4; 6-4=2; 6-3=3.
For example: 9-5=4; 6-4=2; 6-3=3.
'''Subtraction of the numbers greater than 10.'''
==== '''Subtraction of the numbers greater than 10.''' ====
The facilitator recalls the subtraction numbers less than 10 and consider greater than 10 numbers such as 89 and 57, tell the students to write in the form of flat long units and the students come up with their answers as 8 tens and 9 units, 5 tens and 7 units. The facilitator shows the same example on geogebra file and explains how the units and tens are removed from the minuend. Here among 9 units 7 units are removed so that 2 units are left and in tens out of 8 tens 5 tens is removed so 3 tens are remaining that mean 32 is the difference.
The facilitator recalls the subtraction numbers less than 10 and consider greater than 10 numbers such as 89 and 57, tell the students to write in the form of flat long units and the students come up with their answers as 8 tens and 9 units, 5 tens and 7 units. The facilitator shows the same example on geogebra file and explains how the units and tens are removed from the minuend. Here among 9 units 7 units are removed so that 2 units are left and in tens out of 8 tens 5 tens is removed so 3 tens are remaining that mean 32 is the difference.
27 – 13 = 14; 42 – 21 =21; 68 – 23 = 45;
27 – 13 = 14; 42 – 21 =21; 68 – 23 = 45;
'''Subtraction with carry over/ re-grouping:'''
=== '''Subtraction with carry over/ re-grouping:''' ===
'''Objective:'''
'''Objective:'''