Presentation (Powerpoint) File
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These interesting and varied schemes will help children to learn adding, subtracting multiplying and dividing natural numbers within 100 and develop their computation skills. Animated effects that used in the presentation make it the most interactive for understanding and perception. Some slides has explanation notes below.
Note for slide 8: to see the correct answer, you need to click on the yellow center of the flower. If the sum of the numbers on the petals equals to the number on a green leaf, so a flower is useful, if not so it’s a poisonous flower.
Note for slide 9: To get the answer, you need to make calculations in the bottom line as in the sample in the upper line: if 48-33 = 15, so 27-15 = 12; if 53-36 = 17, so 45-17 = 28.