(21.7)(4.2) =

Question

(21.7)(4.2) =

Quizplus · Accepted Answer

Step 1: Set up long multiplication. Ignore the decimals for now (we deal with those later when we multiply).
 11ec0fda_98e3_40dc_a67f_1fe9b636386d_NR0004_00 Step 2: Multiply from right to left. 2 x 7 = 14. Since 14 has two digits, we carry the first digit (1) to the next column.
 11ec0fda_98e3_40dd_a67f_2347578a222d_NR0004_00 Step 3: Now we calculate 2 x 1 =2. Add the carried digit. So, 2 + 1 = 3.
 11ec0fda_98e3_40de_a67f_972633a260bd_NR0004_00 Step 4: Calculate 2 x 2 = 4.
 11ec0fda_98e3_40df_a67f_9b2307894f9e_NR0004_00 Step 5: Begin multiplying the top number by the next digit in the bottom number (4). 4 x 7 = 28. Since 28 has two digits, we carry the first digit (2) to the next column. Remember to enter a 0 as a placeholder in the last digit.
 11ec0fda_98e3_40e0_a67f_05063a7f511c_NR0004_00 Step 6: Calculate 4 x 1 = 4. Add the carried digit, 4 + 2 = 6.
 11ec0fda_98e3_40e1_a67f_a3348646811b_NR0004_00 Step 7: Now calculate 4 x 2 = 8.
 11ec0fda_98e3_40e2_a67f_27e34711ed30_NR0004_00 Step 8: Now we add the products to get the final result.
 11ec0fda_98e3_40e3_a67f_67f8728fb996_NR0004_00 Step 9: To place the decimal, count the number of digits to the right of the decimal in the problem. The total of those digits is how many spaces should come after the decimal in your answer.
 11ec0fda_98e3_40e4_a67f_fdd9ddb7c9cd_NR0004_00