By Len Sparrow, Paul Swan
Academics attracted to the whys and hows of incorporating calculators into math guideline will gain greatly from this e-book. the 1st half addresses a huge diversity of questions and matters raised via lecturers. the second one half comprises a set of classroom-tested calculator actions which were designed to strengthen kid's quantity experience and problem-solving skill.
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Extra resources for Learning Math With Calculators: Activities for Grades 3-8
Have the children explore other strings of numbers on the calculators and note their responses using a chart like this one, which shows sample equations: 30 ▼ Problem CALCULATOR ACTIVITIES FOR THE CLASSROOM Answer on four-function calculator Answer on advanced-function calculator 2+3+6 2x3+7 7+2x3 20 – 10 ÷ 2 26 + 5 – 7 x 3 2+8–3x4÷2 Discuss with children why certain combinations of operations result in the same answer on both types of calculator. Extension Children will need several different models of calculators.
Grades 3–5 47 ▼ LEARNING MATH WITH CALCULATORS Materials Calculator, paper, and pencil for each pair of children. Activity Have each pair of children use the calculator to solve the following problem: Using only the numbers 1, 2, 3, 4, and 5 and the addition operation, devise a way to obtain a total of 37. Numbers can be combined as well as used repeatedly. Extensions Variations of this activity could include: allowing subtraction as well as addition to be used ◆ allowing any of the four basic operations to be used ◆ allowing each digit to be used only once ◆ having students start from 37 and subtract the designated numbers until they reach zero ◆ Teaching Notes Children will produce a variety of ways to reach 37—some may repeatedly add 1 until they reach the desired result.
Activities that identify and acknowledge these differences are important and useful starting points. The observation of number patterns can help children develop intuition with respect to checking answers. For example, children who have explored multiplication with two-digit numbers are aware of patterns that occur with these types of calculations, and know what types of results to expect when performing them. For example, when multiplying a two-digit number by a twodigit number, children will observe that the result is always a three-digit or four-digit number.