Decimals Operations 10/15

A/S

100

-9 + (-8.33)

-17.33

200

(-2.109) + (-0.8)

-2.909

300

-4.22 - (-48.991)

44.771

Mult.

100

9 x (-8.33)

-74.97

200

(-5.5) x 700

-3,850

300

(-5.34)(3.6555)

-19.52037

Pos/Neg

100

4.88888886 + (-800.1)

Negative

200

(-983) x (-22.14)

Positive

300

A multiplication problem with 40,000 negative numbers

Positive

Error?

100

What is the FIRST thing wrong with this explanation?

The problem is (-2.4) + (5). We line up the 4 and the 5 and subtract. The sum is 2.6

5 and 2 should be lined up.

200

What is the FIRST thing wrong with this explanation?

The problem is (-8.82) times (4.221). Using stacked multiplication, I put 8.82 on top because 8 is larger than 4. After some multiplying, the product is -37.22922.

-8.82 has less digits and should NOT go on top for stacked multiplication.

300

What is wrong with this explanation?

The problem is 9.993 - (-2.224). The difference is 12.217.

Where is the work?!

Trivia - Hispanic Heritage Month

100

Name your Hispanic mathematician that you did your assignment on

Various

200

These mathematicians were from various countries and backgrounds. Name five countries whose flags are on the Mathletics Department board.

Various

300

When does Hispanic Heritage month run from?

September 15 - October 15