joe has 5 books and his brother has 7 books. choose a number sentence to find the number of books they have all together.

Joe has 5 books and his brother has 7 books. Choose a number sentence to find the number of books they have all together. => 7 - 5 = 13 or 7..

Introduction - The word 'Induction' means method of reasoning from individual cases to general ones or from observed instances to unobserved ones. Many important mathematical formulae are such that a result is formed by some means which does not provide for a direct proof. Mathematical Induction is..

Sally can complete reading a book in an hour. How many books having the same number of pages can she read in 5 hours? => 5 or 7 or 1 or 3..

Irena collected 7 books, Zelma collected 3 books, and Valerie collected 3 books at a country fair. Find the total number of books they collected altogether. => 16 or 15 or 13 or 11..

45 books are to be divided into 2 equal sets. Find the number of books in each set and how many books will be left over? => 20, 5 or 22, 2 or 22, 1 or 90, 2..

Rebecca bought 9 books, each of which cost $3. Which two number sentences are true for the total cost of the books? => 9 - 3 and 9 +3 or 9 ÷ 3 and 3 ÷ 9 or 9 × 3 and 6 × 3 or 9 × 3 and 3 × 9..

There are 5,064 books that need to be packed in boxes. There are 6 boxes. We want to put the same number of books in each box. How many books will fit into each box? => 844 or 94 or 92 or 95..

Amanda had a collection of 62 story books. She donated 19 of them. She bought 23 more story books. Which number sentence shows the number of story books that Amanda has now? => 62 + 19 - 23 or 62 - 19 or 62 + 23 or 62 - 19 + 23..

The cost of two books is $17.50. Find the cost of each book. Round to the nearest whole number. => $7 or $8 or $10 or $9..

Nancy read 67 pages of a book containing 220 pages. Choose the number sentence that helps you to calculate the number of pages to be read, n to complete the book. => n + 67 = 220 or 220 - 76 = n or 220 - 67 = n or 220 + 67 = n..