Fluency in Addition and Subtraction within 100
Grade Two · Lesson 9 · 2:38 · Animated lesson with English narration
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Transcript
Forty-seven. Plus twenty-five. Seven plus five equals twelve. Forty plus twenty plus ten equals seventy. Seventy-two. Fifty-six. Plus thirty-eight. Six plus eight equals fourteen.
Fifty plus thirty plus ten equals ninety. Ninety-four. Seventy-three. Minus twenty-seven. Borrow one ten. Sixty-six. Sixty minus twenty equals forty. Forty-six. Sixty-four. Plus nineteen.
Four plus nine equals thirteen. Sixty plus ten plus ten equals eighty. Eighty-three. Eighty-two. Minus forty-five. Borrow one ten. Seventy-seven. Seventy minus forty equals thirty. Thirty-seven.
Fifty-five. Plus thirty-six. Five plus six equals eleven. Fifty plus thirty plus ten equals ninety. Ninety-one.
Transcript generated from the lesson narration.
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