Mental Math: Adding and Subtracting 10 or 100
Grade Two · Lesson 12 · 3:24 · Animated lesson with English narration
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Transcript
Problem a. three hundred and fifty. plus ten. Zero plus zero equals zero. fifty plus ten equals sixty. three hundred plus zero equals three hundred. three hundred and sixty. Problem b.
four hundred and eighty. plus ten. Zero plus zero equals zero. eighty plus ten equals ninety. four hundred plus zero equals four hundred. four hundred and ninety. Problem c. six hundred and twenty.
plus one hundred. Zero plus zero equals zero. twenty plus zero equals twenty. six hundred plus one hundred equals seven hundred. seven hundred and twenty. Problem d. seven hundred and fifty.
minus ten. Zero minus zero equals zero. fifty minus ten equals forty. seven hundred minus zero equals seven hundred. seven hundred and forty. Problem e. three hundred. minus one hundred.
Zero minus zero equals zero. three hundred minus one hundred equals two hundred. two hundred. Problem f. five hundred and sixty. plus ten. Zero plus zero equals zero. sixty plus ten equals seventy.
five hundred plus zero equals five hundred. five hundred and seventy.
Transcript generated from the lesson narration.
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