A
二月
February
June
平年
common year
闰年
leap year
十一月
November
Which months only have 30 days?
April, June, September, November
Which months have 31 days?
January, March, May, July, August, October, December
How to identify a leap year?
There 29 days in Feb. It is a multiple of 4 ( and 400).
Which of the following year is a leap year?
a. 2300 b. 2028 c. 2017
b. 2028
How many weeks and days are there in a common year?
52 weeks and 1 day
How many weeks and days are there in 2048?
52 weeks and 2 days
factors
Product
Find the product by column method.
32 x 17=
544
Find the product by column method.
23 x 42
966
Find the missing number.
____x_____=720
72 and 10
36 and 20
24 and 30
12 and 60
How many days are there in April, May and June?
91 days
2027年的一月一日是星期五，这年共有多少个星期六？
53 weeks
How many days are there in August, September and October?
92 days
12 x 39 is more than 25 x 19, is it true or false?
FALSE
12x 39= 468
25 x 19 = 475