In this Mental Math unit, we are focusing on strategies that help us compute mentally, but also how we show our thinking in words or visuals. We practiced today with 4 strategies. Unfortunately, my photograph from today's lesson would not upload.
Here are the strategies:
1. Add the tens, then add the ones. For example: 53+13= 50 + 10= 60, and 3+3=6. 60+6=66.
2. Number bonds. For example: 56 + 7 = Think "I need 4 more to get to 60, I will have 3 l3ft from the 7. So, 56 + 7= 63.
3. Add the nearest 10, then subtract the extra. For example: 62 + 19= 62 + 20= 82, 82- 1= 81
4. Number lines: For example: Start the number line with the largest number. If we use 62 +19 again, begin the number line with 62. Jump 10 on the number line and show 72, then add the 9 and end on 81.
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