Holiday Maths

Maths

1. 22 X 2.5 = 55

Remove the decimal point and times the whole numbers together

22 X 25 = 550

And if I add the decimal point (.) back to the equation the 0 from 550 becomes 55.0 or 55

2. 132 X 43 = 5676

(66 x 86=)

(6 x 60=360)+(6 x 6=36)

(360+36=396)

(80 x 60 4800)+(80 x 6=480)

(4800 + 480=5280)

5280+396+5676

3. 34.9 + 32.3 = 67.2

34 9/10 + 32 3/10

34+32=66

9/10 + 3/10= 1.2

(66+1.2=67.2)

4. 0.05 + 0.3 = 0.35

5 hundredths(00.05) plus 3 tenths

5. 13.4 X 8 =  107.2

I used algorithm.

6. 12 - 8.3 = 3.7

10-8.3 =1.7 + 2.0= 3.7

7. 23 - 21.01 = 1.99

21.01 + 00. 99=22.00

23.00+00.99= 23.99

(23.99-22=1.99

8. 843.984 what is the value of 4 in this number?

Hundred thousands (843) Ones (984)

9. How many in a baker’s dozen?

13

10. How many weeks in a year?

52.1429

10. How many weeks in a leap year?

52.2857

10. How many minutes in 4.5 hours?

270 minutes

2 hours = 120 minutes

4 hours=  240

30 minutes= 30 minutes

240+30=270