3CI4 Math Unit 11 More multiplication and division

Which is NOT in the fact family for 6,3,18?

• • A) 6×3=18

• • B) 3×6=18

• • C) 18÷3=6

• • D) 6÷3=18

Here is part of a number sequence

3, 6, 9, 12,....

Extend the sequence and write the first number in the sequence that is greater than 20.

What is the term-to-term rule for 24, 18, 12, 6?

• • Add 6

• • Subtract 6

• • Multiply by 6

• Divide by 6

Estimate the answer for 61×3:

• • 150

• • 180

• • 210

• • 240

The product of 8 and ___ is 64.

In the sequence 15, 20, 25, the term-to-term rule is ___ ____.

In the sequence 45, 40, 35, the term-to-term rule is ___ ____

Which number is included 3 times in the grid?

• 18

• 27

• 30

• 90

In a 10 by 10 multiplication grid, which of the following numbers appears five times, and why?

• 18,

  because it has factor pairs such as 1×181×18, 2×92×9, and 3×63×6.

• 24,

  because it has factor pairs such as 1×241×24, 2×122×12, 3×83×8, 4×64×6, and 6×46×4.

• 36,

  because it has factor pairs such as 1×361×36, 2×182×18, 3×123×12, and 6×66×6.

  .

• 48,

  because it has factor pairs such as 1×481×48, 2×242×24, 3×163×16, and 4×124×12

Spider-man wonders why there is no zero row or column on the multiplication square.

Which of the following best explains why?

• • Because zero is not a whole number.

• • Because zero is always the result when multiplied by any number, making the entire row or column unnecessary.

• • Because zero only appears in addition tables, not multiplication tables.

• • Because zero is only used for even numbers in multiplication