Mathletes 3

Addition

100

45+15

60

200

854+526

1380

300

425+6258

6683

Subtraction

100

60-15

45

200

801-609

192

300

7405-76

7329

Multiplication

100

8 x 9

72

200

12 x 12

144

300

15 x 15

225

Riddles

100

I’m an even, single-digit number. Once you write me, I have no start or end. I look like a standing pair of glasses. Who am I?

8

200

What weighs more, a pound of feathers or a pound of bricks?

They weigh the same.

300

If a boy blows 18 bubbles, and then he pops 7, eats 6, stomps 5, and blows another 1, how many are left?

One.

Fractions

100

1/2+1/2

1

200

4/9+2/9

6/9

300

4/5+2/10

10/10   or 1