- How are number lines and arrays alike?
- How are number lines and arrays different?
- How can using a number line make multiplication faster and easier?
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3rd Grade, Mini-Unit 1: Multiplication Concepts covers the following standards:
0:01 Let’s focus on using number lines to practice multiplication. One strategy to multiply quickly is to skip count. You can use number lines to skip count.
0:14 Four jumps of two on a number line. Four times two equals eight. One, two, three, four. That’s four jumps in each jump is two.
0:27 Thank you. So your skip counting, two, four, six, eight. The answer to multiplication equation is called the product. In four times two equals eight, eight is the product.
0:40 Let’s jump on the number line. What multiplication equation do you see? What is the product? I jumped three jumps of three.
0:54 The equation Thank you. Thank you. Thank you. The question is three times three and the product is nine. Now you try.
1:01 Starting at zero, I jump three jumps of six. What is my equation? . And product. Three jumps of six equals eighteen.
1:17 Three times six is eighteen. You can jump on scale. Skip counting number lines two. This number line skip counts by twos.
1:32 So instead of listing all of the numbers, they just skip count by twos. You can use it to multiply by two to solve six times to jump six times on the number line.
1:45 Two, four, six, eight, ten, twelve. The Thanks for watching! Product of six times two is twelve. What’s the mistake? One times nine equals forty-five.
2:12 Oops, the jumps were counted as ones instead of 5’s. This number line is a model of 9 times 5, not 9 times 1.
2:23 Each jump is a 5, not a 1, so 9 times 5 equals 45.