Multiply 6-10 Groups using Mental Math 3-46
Transition from number bonds to using equations and mental math. What's 9x7? 9 groups are 5 groups and 4 groups. Since 5x7 = 35 and 4x7 = 28, 9x7 = 35+28 = 63. 9 groups are also 10 groups minus 1 group. Since 10x7 = 70, 9x7 = 70-7 = 63. Build computational fluency by breaking numbers apart in different ways.
