Javier bought 9 textbooks. Altogether, the books weighed 77.85 pounds.
How much, on average, did each book weigh?

Question

Quizplus · Accepted Answer

We can solve this problem by dividing the total weight of the books (77.85) by the number of books (9).
To do this, we are going to follow this rotation of steps:
D - Divide
M - Multiply
S - Subtract
B - Bring Down
Step 1: Set up long division.
 11ec0fda_98ca_628e_a67f_6b5f3c354b52_NR0004_00 Step 2: Divide 77 ÷ 9, which is 8 (with a remainder of 5, but we do not do anything with a remainder until the very last step). Put the 8 over the ones place of the number that was just divided (the 7 of the 77). Multiply the 8 by the divisor (9) and write the answer (72) directly underneath the number you divided (77). Subtract 77 - 72 and write the answer underneath the 72.
 11ec0fda_98ca_628f_a67f_e725af6a30cd_NR0004_00 Bring Down the next number in the dividend, which is 8.
 11ec0fda_98ca_6290_a67f_39cde9f1bec6_NR0004_00 Step 3: Divide 58 ÷ 9, which is 6 (with a remainder of 4, but we do not do anything with a remainder until the very last step). Put the 6 over the ones place of the number that was just divided (the 8 of the 58). Multiply the 6 by the divisor (9) and write the answer (54) directly underneath the number you divided (58). Subtract 58 - 54 and write the answer underneath the 54.
 11ec0fda_98ca_6291_a67f_451aa480f96c_NR0004_00 Bring Down the next number in the dividend, which is 5.
 11ec0fda_98ca_6292_a67f_b5f8e8467e31_NR0004_00 Step 4: Divide 45 ÷ 9, which is 5, with no remainder. Put the 5 over the ones place of the number that was just divided (the 5 of the 45). Multiply the 5 by the divisor (9) and write the answer (45) directly underneath the number you divided (45). Subtract 45 - 45 and write the answer (0) underneath the 45. This zero at the bottom at the end of the problem signals that you have your final answer.
 11ec0fda_98ca_6293_a67f_6396f5e25c6c_NR0004_00

Javier Bought 9 Textbooks