Handouts have been given to students to help them review their mental math strategies at home with their parents.  Students are asked to do this twice a week.  Each Monday, we will check the table to see that it has been completed.  Every Monday we will also have a mental math quiz in class.    I will post from time to time some sample test (with answers) that parents can use with their child.Sample questions: Halving and doubling 80 x 25 = 2000200 x 15 = 3000140 x 35 = 4900320 x 25 = 800020 x 75 = 1500 Rounding off a subtraction question500-197= 303 400-192=208 900-399=501 800-196=604 300-198=102 Grouping  multiplication numbers 5 x 13 x 20 = 1300 4 x 15 x 25 = 1500 2 x 24 x 50 = 2400 20 x 75 x 5 = 7500 25 x 81 x 4 = 8100  Dividing by ½ or 0.5 50 ÷ ½ = 100160 ÷ 0.5 = 320 1000 ÷ ½ = 2000 35 ÷ 0.5 = 70 700 ÷ ½ = 1400