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do you ever have problems with problems like for instance your on your last problem on the multiplacation test its one of those tricky nine problems and you just cant figure it out. well I have a few hints for you. for the nine multiplacation problems the products are just opposites. |
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2x9=18 - 9x9=81 |
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3x9=27 - 8x9=72 |
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4x9=36 - 7x9=63 |
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5x9=45 - 6x9=54 |
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you can also see that the first number in the product is one less than the number thats being multiplied. like |
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6x9=54 the 5 in 54 is one less than 6. get what Im saying lets do another. |
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8x9=72 the 7 in 72 is one less than 8. |
