Lesson
8 – Choosing a Calculation Method
To encourage students to have fun on the Web while learning about Choosing
a Calculation Method, here are some games and interactive activities they
can do on their own or in pairs.
Goal
Choose the best way to add or subtract.
Builds Upon
Student Book pages 168-169
Instructions for Use
Interactive
Calculator allows students to practice a method to add or subtract.
To use the Interactive
Calculator, start by pressing any number. This number will appear in the
window. Press the ‘+’ button or the ‘-’ button
on the calculator, the number selected becomes shaded on the hundreds
board. Add or subtract numbers. Press the ‘=’ button on the
calculator to show the answer.
Estimating
Differences lets students practice a method of estimating the difference
of 2 numbers.
To use Estimating Differences, click
the ‘Start Subtraction’ button and read the equation in the
text fields. Have students click the button to indicate if the answer
is correct.
Estimating
Sums lets students practice a method of estimating the sums of 2 numbers.
To use Estimating Sums, click
the ‘Start’ button and read the equation in the text fields.
Have students input the estimation for the given equation. Click the ‘Check”
button to indicate if students have the correct answer.
|