1. Mental Math Activities
Mathematics 8 Support
Mental Math Activities

2. 12.5 x 4 =
Could use double-double strategy, or distributive property, or halve-double strategy
From Mental Math in Mathematics 8: page 4

3. is between what two whole numbers?
From Mental Math in Mathematics 8: page 5

4. Estimate the sum 3/7 + 7//8 + 1/10  ½ + 1 + 0 = 1½
3/7 + 7//8 + 1/10  ½ = 1½
From Mental Math in Mathematics 8: page 7

5. Which numbered image shows a translation of Figure A?
From Mental Math in Mathematics 8: page 12

6. Reproduce the transformation A  B
Give teachers a piece of dot paper. Then show them this slide, in which the pre-image and the image will be seen for 5 seconds. The image will then disappear, leaving only the pre-image. Ask the teachers to reproduce the transformation.
From Mental Math in Mathematics 8: page 13

7. Solve for x
From Mental Math in Mathematics 8: page 16

8. Which of these mat plans would result in this building?
From Mental Math in Mathematics 8: page 18

9. Express 90% as a fraction
From Mental Math in Mathematics 8: page 18

10. Express as a percent
From Mental Math in Mathematics 8: page 18

11. 8 is 25% of 
From Mental Math in Mathematics 8: page 20

12. From Mental Math in Mathematics 8: page 21

13. 28 + 36 + 22+ 34 Calculate the mean of
and are compatible numbers
From Mental Math in Mathematics 8: page 22

14. Evaluate:
4 x 100 x (–8)
From Mental Math in Mathematics 8: page 25

15. 2 x 24 x 50 =
From Mental Math in Mathematics 8: page 26

16. 3x + 4 – 6x – 10 Combine Like Terms
From Mental Math in Mathematics 8: page 29

17. x + 6 = –1 Mentally solve for x
From Mental Math in Mathematics 8: page 30

18. Evaluate
5 + 4x
when x = –4
From Mental Math in Mathematics 8: page 30

19. Calculate the volume
From Mental Math in Mathematics 8: page 35