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Warm Up. List Factors:. Draw Arrays:. 1, __, __, __, __,12. Product: 12. Write Equations:. How many equal groups? 1_ equal groups of ____ make _12_ 12_ equal groups of ____ make _1_ ____ equal groups of ____ make ___ ____ equal groups of ____ make ___
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Warm Up List Factors: Draw Arrays: 1, __, __, __, __,12 Product: 12 Write Equations: How many equal groups? 1_ equal groups of ____ make _12_ 12_ equal groups of ____ make _1_ ____ equal groups of ____ make ___ ____ equal groups of ____ make ___ ____ equal groups of ____ make ___ ____ equal groups of ____ make ___ 1 x 12 _________ 12 x 1 _________ _________ _________ 1,444 - 509 456 + 672
Ten Minute Math Today's Number: 471 • Students create an expression to equal 471 using addition and subtraction. • For example: 471= 600-200+50+30-9 and 300+150+21=471 • How can you be sure this expression equals 471? • Explain your strategy so that the rest of the class can understand it. • Describe and write about your strategies.
Elias runs a concession stand at the football stadium. The chart shows the cost of the items that Elias sells. Akasha bought 4 sodas. What is the least/most amount of money she could have spent? Target the Question
Array Cards • How can we find the products represented by these arrays? • Are there any here that seem easier then others? • What do you already know about these numbers that could help you figure out how many squares are in each of these arrays? • Share strategies
You may have used: • Skip counting • Remembering patterns for multiplying with 10 and 11 • Just knowing • Reasoning from knowing multiplication combinations Have students demonstrate where the smaller arrays are located within the larger arrays.
Review directions for game and Model. • Have students divide a blank sheet of paper into two columns, titled “Combinations I Know” and “Combinations I’m Working On.” • As students play the game in pairs, students will place each multiplication expression in the correct column. Combinations I Know Combinations I am Still Working On
How Many Groups? 3. ____ groups of 9 make 63 • ____ x 9 = 63 Draw the groups of 9 that would make 63. • ____ groups of 8 make 24 • ____ x 8 = 24 • How many total Gatorades are shown on the left? 6. Explain how you came up with your answer in writing.
Closure Discuss “Another Array Picture.” In this picture, a case of yogurt containers that come on packs of 4 has been opened, and some the 4-packs are missing. How many yogurts were in this case to begin with? Allow students to work in pairs to solve the problem. Then gather ideas for how to solve the problem, and write them on the board.
