Spiral Review—Q1P1

The product of 6 and 12 is ______.

• 18

• 6

• 48

• 72

4 x 3 = 12

• 12 is a factor.

• 4 and 3 are factors.

• 4, 3 and 12 are all factors.

A prime number is ______.

• a number that has more than 2 factors.

• a number that is divisible by 2
• A number that has 2 factors which includes 1 and itself.

• a number that's digits always add up to 9.

The expanded form of 8.62 is _____.

• 8 + 0.6 + 0.2
• 8 + 0.6 + 0.02
• 8 + 0.06 + 0.02
• 8 + 0.6 + 0.002

The expanded notation of 8.62 is _____.

• (8 x 1) + (6 x .1) + (2 x .01)

• (8 x 10) + (6 x .1) + (2 x .01)

• 8 + 0.6 + 0.2

• 8 + 0.62

When you multiply or divide numbers with decimals you need to line the decimals up.

• False

• Only when multiplying numbers with decimals
• Only when dividing numbers with decimals
• True

21.4

• - 12.3

• 8.2

• 8.1

• 9.1

• 9.2

13.2

x 21

• 277.2

• 264

• 316.8

• 279.84

When you add or subtract numbers with decimals you need to line the decimals up.

• Only when the decimals are the same
• True
• Not always
• False

6 x 6 =

• 18

• 36

• 42

• 30