Category: Adding and Subtracting Decimals

Problem 1 A mixture is obtained by mixing four items of following weights; 132.45 grams, 220.11 grams, 128.62 grams and 140 grams. What is the total weight of the mixture? Solution Step 1: The first items weight = 132.45 grams The second items weight = 220.11 grams The third items weight = 128.62 grams The…

Problem 1 If Rita is given 2 checks, one for 39.99,anotherfor18.49, how much is the total of the 2 checks? Solution Step 1: The first checks value = $39.99 The second checks value = $18.49 Step 2: The sum of the two checks = 39.99+18.49 = $58.48 Problem 2 If the rain for the year at a…

Introduction Subtraction of money in dollars and cents is same as the subtraction of decimal numbers. Rules for subtraction with money Problem 1 Subtract 187.1893.49 Solution Step 1: The money amounts to be subtracted are lined up vertically with the decimal points and dollar signs aligned one above the other. Step 2: We begin at the…

Problem 1 Estimate the sum after rounding each number to the nearest tenth 98.09 + 23.41 11.30 27.85 Solution Step 1 Rounding each term to nearest tenth, the expression becomes = 98.09 + 23.41 11.30 27.85 = 98.1 +23.4 11.3 27.9 = 121.5 39.2 = 82.3 Step 2 So the estimated sum after rounding each…

Introduction Basic subtraction of decimals is similar to subtraction of whole numbers without borrowing. Rules for Decimal Subtraction Problem 1 Subtract 38.48 16.3 Solution Step 1 The decimals are aligned as shown. A zero is added to the right of 16.3 as the maximum number of decimal places is 2. Step 2 We start with the…

Introduction Decimals have to be aligned so that digits with same place values are placed one above the other. Such decimals are aligned decimals. The decimals have to be aligned before subtraction is done. Subtraction of aligned decimals is similar to subtraction of whole numbers. Rules for Subtraction of Aligned Decimals Problem 1 Subtract 18.48 6.3…

Introduction Addition of three decimals is similar to addition of two decimals. Rules for decimal addition with 3 numbers Problem 1 Add 67.07 + 13.41 + 7.30 Solution Step 1: The decimals are aligned vertically above one another as shown. Step 2: We begin at the rightmost column 7 + 1 + 0 = 8; moving left 0…

Definition The decimals are aligned so that the digits of same place values are above and below each other. Such decimals are aligned decimals. It is necessary that the decimals are aligned before addition. Addition of aligned decimals is similar to addition of whole numbers. Rules of decimal addition So, at first the decimals are…

This tutorial provides comprehensive coverage of adding and subtracting of decimals based on Common Core CCSS and State Standards and its prerequisites. Students can navigate learning paths based on their level of readiness. Institutional users may customize the scope and sequence to meet curricular needs. This simple tutorial uses appropriate examples to help you understand adding and…