 Virtual Textbook Resource Resource description BASIC ARITHMETIC Simple additon of numbers between 1 and 20 Simple multiplication of numbers between 1 and 12 Simple subtraction of a 1 digit number from a 2 digit number DECIMALS Add 1decimal place to 1 decimal place Add numbers like 18.4 and 6.7 Add 1decimal place to whole number Add numbers like 17.6 and 24 Add 2dp to 2dp Add numbers like 2.37 and 1.82 Subtract 1 decimal place Subtract numbers like 10.2 and 5.6 Subtract 2 decimal places Subtract numbers like 9.21 and 7.33 Multiply 1dp by 1dp (less than 1) Mulitply numbers like 0.9 and 0.4 Multiply 1 digit by 2dp Multiply numbers like 7 and 2.38 Multiply 2 digit by 2dp Multiply numbers like 18 and 5.88 Multiply whole number by 1dp greater than 1 Multiply numbers like 9 and 4.6 Multiply whole number by 1dp less than 1 Multiply numbers like 7 and 0.6 Multiply whole number by 1dp Multiply numbers like 12 and 0.9 PERCENTAGES Percentage of an amount Calculate 10, 5, 20, 1 and 17.5% of amounts without a calculator Percentage of an amount-calculator Calculate various percentages of amounts using a calculator Increase by a percentage Calculate 10, 5, 20, 1 and 17.5% increases of amounts without a calculator Decrease by a percentage Calculate 10, 5, 20, 1 and 17.5% decreases of amounts without a calculator One number as % of another Calculate one number as a percentage of another without a calculator NEGATIVE NUMBERS Add Negative number to positive number 1 to 20 Solve problems like -5 + 8 Solve problems like -48 + 32 Solve problems like 5 - 8 Harder Add positive and negative numbers 1 to 20 Solve problems like 5+-7 and -2+-5 Harder Subtract Negative solutions Solve problems like 2--5 and -4--10 Multiply negative and positive Solve problems like 2 x -3 and -6 x -8 ALGEBRA Multiply brackets Multiply a bracket by a single number